John Joyce | Sheffield Hallam University (original) (raw)

Papers by John Joyce

Research paper thumbnail of Maintaining alignment in management education: The potential for drift in assessment

The international journal of management education, 2009

The paper explores the issues involved in maintaining operational alignment between curriculum ai... more The paper explores the issues involved in maintaining operational alignment between curriculum aims, teaching and the assessment of student learning. Whilst various conceptual frameworks can help to shape learning outcomes that reflect a constructivist approach across an aligned scheme of education there are, nonetheless, opportunities for misalignment to occur with the potential to significantly dilute the aims of the curriculum. A particular focus of the paper is the use of verbs to articulate learning outcomes and how these follow through into assessment mechanisms. The paper argues that drift is likely to occur in all forms of education, although empirical evidence is usually difficult to access due to the confidential nature of assessment processes. In order to illustrate the conjectured concerns, a case study drawing on the published syllabi, examinations and marking schemes from the examinations of a professional accounting body is presented.

Research paper thumbnail of 4f bands in Ce heavy fermions and mixed valent compounds at T â« T{sub K}

We report evidence of 4f band character in Ce 4f states at Τâ«Î¤{sub K} using the technique of h... more We report evidence of 4f band character in Ce 4f states at Τâ«Î¤{sub K} using the technique of high-resolution angle-resolved resonant photoemission. The Ce intermetallic compound CePt{sub +x} was grown and studied in situ by the method of MBE and was characterized by LEED, XPS and XAS. These new findings would suggest a need for a reexamination of 4f photoemission

Research paper thumbnail of Improving group work in accounting: a student perspective

WRITE-UP OF THE RESEARCH Professional and academic accounting associations internationally have t... more WRITE-UP OF THE RESEARCH Professional and academic accounting associations internationally have through published reports and statements, made public their views of the desired profile of a professional accountant. One of the most interesting aspects to have arisen out of these statements is the increasing relevance given to a set of non-accounting capabilities and skills. The Accounting Education Change Commission's (AECC) Position Statement Number One (1990) suggests that, "To become successful, professionals accounting graduates must possess communication skills, intellectual skills and interpersonal skills." These interpersonal skills are defined as "... the ability to work effectively in groups and to provide leadership when appropriate." Issues surrounding the use of group work do not lie just within the boundaries of accounting education. Despite the inherent problems with group work previous research has recognized the need for this pedagogic approach...

Research paper thumbnail of Contabilidad y Aprensión Comunicativa: Estudio Comparativo de los Niveles y Perfiles de AC en los Estudiantes Universitarios

Accounting in about communicating. In this regard, important accounting bodies and firms have exp... more Accounting in about communicating. In this regard, important accounting bodies and firms have expressed their opinion, based on results from research carried out, advocating greater emphasis in the development of communication skills throughout accounting degrees. As a consequence, an increasing number of accounting programs are including communication skills as educational objectives. integrating activities in order to improve these skills. However, the effect of constraining factors must be taken into account, such as communicative apprehension (CA) which can cause educational and training efforts to be ineffective, to the extent of being counterproductive. In this paper, we study the levels and profiles of communicative apprehension in accounting students compared to those obtained from a sample of students at other faculties. communicative apprehension, accounting education, communication skills.

Research paper thumbnail of Photoemission and the electronic structure of PuCoGa5

Physical review letters, Jan 24, 2003

The electronic structure of the first Pu-based superconductor PuCoGa5 is explored using photoelec... more The electronic structure of the first Pu-based superconductor PuCoGa5 is explored using photoelectron spectroscopy and a novel theoretical scheme. Exceptional agreement between calculation and experiment defines a path forward for understanding the electronic structure aspects of Pu-based materials. The photoemission results show two separate regions of 5f electron spectral intensity, one at the Fermi energy and another centered 1.2 eV below the Fermi level. The results for PuCoGa5 clearly indicate 5f electron behavior on the threshold between localized and itinerant. Comparisons to delta phase Pu metal show a broader framework for understanding the fundamental electronic properties of the Pu 5f levels in general within two configurations, one localized and one itinerant.

Research paper thumbnail of Electronic structure near EF in YBa2Cu3Ox for 6.35 <= x <= 6.9: A photoemission study

Physical review. B, Condensed matter, 1992

... I 1 4 !&#x27;4 I 2 &#x27;&#x27; 1\ \ C 2 99-9= 0=- 45 5619 I .4 RONG LIU et al. .... more ... I 1 4 !&#x27;4 I 2 &#x27;&#x27; 1\ \ C 2 99-9= 0=- 45 5619 I .4 RONG LIU et al. ... C. Summary High-resolution ARPES measurements are reported for YBa2CU30, when oxygen stoichiometries are con-trolled in the range 6.35 -: ELECTRONIC STRUCTURE NEAR EF IN YBa2Cu3O, FOR ... Lett. ...

Research paper thumbnail of Evidence for possible 4f bands at T > TK in the heavy-fermion single crystal CePt2+x

Physical review. B, Condensed matter, 1995

We report the observation of strong amplitude variations with k in the 4f photoelectron spectra o... more We report the observation of strong amplitude variations with k in the 4f photoelectron spectra of a nearly trivalent heavy-fermion compound (CePt2+x). The amplitude of the 4f feature, previously identified as the Kondo resonance, displays the full symmetry of the lattice, suggesting some band character already at T~=10TK. Kondo lattice-derived bands are expected to exist only at T&amp;amp;amp;amp;lt;&amp;amp;amp;amp;lt;TK, so that

Research paper thumbnail of Assessment in Higher Education: The Potential for a Community of Practice to Improve Inter-marker Reliability

Accounting Education, 2014

ABSTRACT The design, delivery and assessment of a complete educational scheme, such as a degree p... more ABSTRACT The design, delivery and assessment of a complete educational scheme, such as a degree programme or a professional qualification course, is a complex matter. Maintaining alignment between the stated aims of the curriculum and the scoring of student achievement is an overarching concern. The potential for drift across individual aspects of an educational scheme (teaching, learning and assessment), together with emerging criticism in extant literature of the reliability of marking processes, suggests that, in practice, maintaining alignment might be more difficult than had previously been assumed.In this paper, the concept of a Community of Practice (CoP) is employed as an analytical lens through which the notion of a markers&#39; standardisation meeting that focuses on maintaining alignment between the curriculum, the marking scheme and the scoring of student scripts can be critically examined. Given that the aims and subject content of management learning are both multidimensional and contextual, such meetings have the potential to develop a shared approach to the elaboration and application of the marking scheme. A further role of the CoP is in the calibration of markers to accommodate further variations in student responses as they arise in the actual marking process. In this respect, the CoP has both descriptive and prescriptive potential in terms of aiding the development of markers of professional accounting examinations and also, we suggest, within accounting education more generally.

Research paper thumbnail of Photoelectron spectroscopy in heavy fermion systems: emphasis on single crystals

We have investigated a number of Ce and Yb heavy fermion compounds via photoelectron spectroscopy... more We have investigated a number of Ce and Yb heavy fermion compounds via photoelectron spectroscopy and compared the results to the predictions of the Imurity Anderson Hamiltonian within the Gunnarson-Schonhammer approach. For the low T{sub K} materials investigated we find little or no correlation with T{sub K}, the only parameter that can be determined independent of photoemission.

Research paper thumbnail of Vocation, motivation and approaches to learning: a comparative study

Education + Training, 2015

Research paper thumbnail of Acounting and Communicative Apprehension: Comparative Study on CA Levels and Profiles of University Students

Accounting in about communicating. In this regard, important accounting bodies and firms have exp... more Accounting in about communicating. In this regard, important accounting bodies and firms have expressed their opinion, based on results from research carried out, advocating greater emphasis in the development of communication skills throughout accounting degrees. As a consequence, an increasing number of accounting programs are including communication skills as educational objectives. integrating activities in order to improve these skills. However,

Research paper thumbnail of OPTICS; ATOMS and MOLECULES; SPECTROSCOPY; PHOTON DETECTORS

... 2312 Plasma emission tomographic reconstruction in the large helical device Y. Liu, A. Yu. ..... more ... 2312 Plasma emission tomographic reconstruction in the large helical device Y. Liu, A. Yu. ... 2418 Thermal conductivity calibration for hot wire based dc scanning thermal microscopy Stéphane Lefe`vre, Sebastian Volz, Jean-Bernard Saulnier ... Zemb, O. Taché, F. Né, and O. Spalla ...

Research paper thumbnail of Self-concept in communication skills and communication apprehension: A comparative study of students' profiles at the new business and economics area degrees | Autoconcepto en capacidades de comunicación y aprensión: Un estudio comparativo de los estudiantes en los nuevos grados del área de Cienc...

Research paper thumbnail of Electronic work-function calculations of polycrystalline metal surfaces revisited

Physical Review B, 2001

Electronic work-function calculations of polycrystalline metal surfaces revisited. Tomasz Durakie... more Electronic work-function calculations of polycrystalline metal surfaces revisited. Tomasz Durakiewicz 1 * , Stanislaw Halas 2 , Al Arko 1 , John J. Joyce 1 , and Dave P. Moore 1 1 Los Alamos National Laboratory, Mailstop K764 ...

Research paper thumbnail of Localized and Itinerant States in Pu Materials

MRS Proceedings, 2005

ABSTRACT The electronic structure of Pu materials is examined using photoelectron spectroscopy. F... more ABSTRACT The electronic structure of Pu materials is examined using photoelectron spectroscopy. For delta-phase Pu metal as well as PuCoGa5 and PuIn3, the 5f electrons appear to be at the threshold between localized and itinerant character. A mixed level model computational scheme is used which results in non-magnetic solutions for the electronic structure and agrees well with the photoemission measurements. Several other computational schemes are assessed against photoemission results for delta Pu. Additional insight is provided by O2 and H2 dosing of the delta Pu samples and consideration of surface effects. The experimental and computational results are consistent with the 5f electrons in Pu materials exhibiting a dual nature with some fraction of the 5f levels localized and not participating in the bonding while the other fraction of 5f character is involved in bonding and hybridization with the conduction electrons.

Research paper thumbnail of Communication apprehension and communication self‐efficacy in accounting students

Asian Review of Accounting, 2013

ABSTRACT Purpose ‐ The purpose of this paper is to establish a link between communication apprehe... more ABSTRACT Purpose ‐ The purpose of this paper is to establish a link between communication apprehension and communication self-efficacy in accounting students. Design/methodology/approach ‐ This is achieved by the use of two questionnaires jointly distributed to the students involved. The Personal Report of Communication Apprehension (PRCA-24) developed by McCroskey to measure oral communication apprehension[1] (OCA) and the instrument for written communication apprehension (WCA) developed by Daly and Miller and a questionnaire to measure communication self-efficacy. This had been developed using the guidelines set out by Bandura and was designed to measure two constructs: oral communication self-efficacy, and written communication self-efficacy. Findings ‐ The two separate statistical tests to identify the connection between the two concepts both indicated the existence of a strong relationship between the two. This was shown not only in the overall relationship between communication apprehension and self-efficacy but also equally strongly in their constituent components. Practical implications ‐ The existence of this relationship is important because it provides a possible development in terms of understanding the barrier to the development of communication skills and also indicates a possible redirection to alleviate and remove the barrier. In order for accountants to meet future challenges, there is substantial evidence that the development of communication skills will be vital. Originality/value ‐ This paper draws the conclusion that in the future consideration needs to be given to incorporating into the pedagogy of accounting education, especially in those areas involving the development of communication skills, approaches that increase self-efficacy.

Research paper thumbnail of Accounting Students and Communication Apprehension: A Study of Spanish and UK Students

European Accounting Review, 2007

Accounting is about measuring and communicating. Accounting bodies and employers have expressed o... more Accounting is about measuring and communicating. Accounting bodies and employers have expressed opinions, which have been supported by research results, advocating that greater emphasis is placed on the development of communication skills throughout the education ...

Research paper thumbnail of Quality in higher education: from monitoring to management

Quality Assurance in Education, 2003

... The Authors. John Cullen, John Cullen is Professor of Management Accounting, at Sheffield Hal... more ... The Authors. John Cullen, John Cullen is Professor of Management Accounting, at Sheffield Hallam University, Sheffield, UK. John Joyce, John Joyce is a Principal Lecturer in Management Accounting at Sheffield Hallam University, Sheffield, UK. ...

Research paper thumbnail of Direct Observation of Itinerant Magnetism in the 5f-Electron System UTe

Physical Review Letters, 2004

Our electron photoemission experiments demonstrate that the magnetization of the ferromagnetic st... more Our electron photoemission experiments demonstrate that the magnetization of the ferromagnetic state of UTe is proportional to the binding energy of the hybridized band centered around 50 meV below E F . This proportionality is direct evidence that the ferromagnetism of UTe is itinerant; i.e., the 5f electrons are not fully localized close to the atomic core. This mechanism of itinerant ferromagnetism differs from the traditional picture for 5f-electron magnetism in an essential and a novel way. We propose a simple model for the observed proportionality between the temperature dependence of the magnetization and the binding energy of the hybridized band near E F . This model allows us to estimate the effective magnetic interaction and to identify signatures of itinerant ferromagnetism in other materials.

Research paper thumbnail of Spectral properties of δ-plutonium: Sensitivity to 5f occupancy

Research paper thumbnail of Maintaining alignment in management education: The potential for drift in assessment

The international journal of management education, 2009

The paper explores the issues involved in maintaining operational alignment between curriculum ai... more The paper explores the issues involved in maintaining operational alignment between curriculum aims, teaching and the assessment of student learning. Whilst various conceptual frameworks can help to shape learning outcomes that reflect a constructivist approach across an aligned scheme of education there are, nonetheless, opportunities for misalignment to occur with the potential to significantly dilute the aims of the curriculum. A particular focus of the paper is the use of verbs to articulate learning outcomes and how these follow through into assessment mechanisms. The paper argues that drift is likely to occur in all forms of education, although empirical evidence is usually difficult to access due to the confidential nature of assessment processes. In order to illustrate the conjectured concerns, a case study drawing on the published syllabi, examinations and marking schemes from the examinations of a professional accounting body is presented.

Research paper thumbnail of 4f bands in Ce heavy fermions and mixed valent compounds at T â« T{sub K}

We report evidence of 4f band character in Ce 4f states at Τâ«Î¤{sub K} using the technique of h... more We report evidence of 4f band character in Ce 4f states at Τâ«Î¤{sub K} using the technique of high-resolution angle-resolved resonant photoemission. The Ce intermetallic compound CePt{sub +x} was grown and studied in situ by the method of MBE and was characterized by LEED, XPS and XAS. These new findings would suggest a need for a reexamination of 4f photoemission

Research paper thumbnail of Improving group work in accounting: a student perspective

WRITE-UP OF THE RESEARCH Professional and academic accounting associations internationally have t... more WRITE-UP OF THE RESEARCH Professional and academic accounting associations internationally have through published reports and statements, made public their views of the desired profile of a professional accountant. One of the most interesting aspects to have arisen out of these statements is the increasing relevance given to a set of non-accounting capabilities and skills. The Accounting Education Change Commission's (AECC) Position Statement Number One (1990) suggests that, "To become successful, professionals accounting graduates must possess communication skills, intellectual skills and interpersonal skills." These interpersonal skills are defined as "... the ability to work effectively in groups and to provide leadership when appropriate." Issues surrounding the use of group work do not lie just within the boundaries of accounting education. Despite the inherent problems with group work previous research has recognized the need for this pedagogic approach...

Research paper thumbnail of Contabilidad y Aprensión Comunicativa: Estudio Comparativo de los Niveles y Perfiles de AC en los Estudiantes Universitarios

Accounting in about communicating. In this regard, important accounting bodies and firms have exp... more Accounting in about communicating. In this regard, important accounting bodies and firms have expressed their opinion, based on results from research carried out, advocating greater emphasis in the development of communication skills throughout accounting degrees. As a consequence, an increasing number of accounting programs are including communication skills as educational objectives. integrating activities in order to improve these skills. However, the effect of constraining factors must be taken into account, such as communicative apprehension (CA) which can cause educational and training efforts to be ineffective, to the extent of being counterproductive. In this paper, we study the levels and profiles of communicative apprehension in accounting students compared to those obtained from a sample of students at other faculties. communicative apprehension, accounting education, communication skills.

Research paper thumbnail of Photoemission and the electronic structure of PuCoGa5

Physical review letters, Jan 24, 2003

The electronic structure of the first Pu-based superconductor PuCoGa5 is explored using photoelec... more The electronic structure of the first Pu-based superconductor PuCoGa5 is explored using photoelectron spectroscopy and a novel theoretical scheme. Exceptional agreement between calculation and experiment defines a path forward for understanding the electronic structure aspects of Pu-based materials. The photoemission results show two separate regions of 5f electron spectral intensity, one at the Fermi energy and another centered 1.2 eV below the Fermi level. The results for PuCoGa5 clearly indicate 5f electron behavior on the threshold between localized and itinerant. Comparisons to delta phase Pu metal show a broader framework for understanding the fundamental electronic properties of the Pu 5f levels in general within two configurations, one localized and one itinerant.

Research paper thumbnail of Electronic structure near EF in YBa2Cu3Ox for 6.35 <= x <= 6.9: A photoemission study

Physical review. B, Condensed matter, 1992

... I 1 4 !&#x27;4 I 2 &#x27;&#x27; 1\ \ C 2 99-9= 0=- 45 5619 I .4 RONG LIU et al. .... more ... I 1 4 !&#x27;4 I 2 &#x27;&#x27; 1\ \ C 2 99-9= 0=- 45 5619 I .4 RONG LIU et al. ... C. Summary High-resolution ARPES measurements are reported for YBa2CU30, when oxygen stoichiometries are con-trolled in the range 6.35 -: ELECTRONIC STRUCTURE NEAR EF IN YBa2Cu3O, FOR ... Lett. ...

Research paper thumbnail of Evidence for possible 4f bands at T > TK in the heavy-fermion single crystal CePt2+x

Physical review. B, Condensed matter, 1995

We report the observation of strong amplitude variations with k in the 4f photoelectron spectra o... more We report the observation of strong amplitude variations with k in the 4f photoelectron spectra of a nearly trivalent heavy-fermion compound (CePt2+x). The amplitude of the 4f feature, previously identified as the Kondo resonance, displays the full symmetry of the lattice, suggesting some band character already at T~=10TK. Kondo lattice-derived bands are expected to exist only at T&amp;amp;amp;amp;lt;&amp;amp;amp;amp;lt;TK, so that

Research paper thumbnail of Assessment in Higher Education: The Potential for a Community of Practice to Improve Inter-marker Reliability

Accounting Education, 2014

ABSTRACT The design, delivery and assessment of a complete educational scheme, such as a degree p... more ABSTRACT The design, delivery and assessment of a complete educational scheme, such as a degree programme or a professional qualification course, is a complex matter. Maintaining alignment between the stated aims of the curriculum and the scoring of student achievement is an overarching concern. The potential for drift across individual aspects of an educational scheme (teaching, learning and assessment), together with emerging criticism in extant literature of the reliability of marking processes, suggests that, in practice, maintaining alignment might be more difficult than had previously been assumed.In this paper, the concept of a Community of Practice (CoP) is employed as an analytical lens through which the notion of a markers&#39; standardisation meeting that focuses on maintaining alignment between the curriculum, the marking scheme and the scoring of student scripts can be critically examined. Given that the aims and subject content of management learning are both multidimensional and contextual, such meetings have the potential to develop a shared approach to the elaboration and application of the marking scheme. A further role of the CoP is in the calibration of markers to accommodate further variations in student responses as they arise in the actual marking process. In this respect, the CoP has both descriptive and prescriptive potential in terms of aiding the development of markers of professional accounting examinations and also, we suggest, within accounting education more generally.

Research paper thumbnail of Photoelectron spectroscopy in heavy fermion systems: emphasis on single crystals

We have investigated a number of Ce and Yb heavy fermion compounds via photoelectron spectroscopy... more We have investigated a number of Ce and Yb heavy fermion compounds via photoelectron spectroscopy and compared the results to the predictions of the Imurity Anderson Hamiltonian within the Gunnarson-Schonhammer approach. For the low T{sub K} materials investigated we find little or no correlation with T{sub K}, the only parameter that can be determined independent of photoemission.

Research paper thumbnail of Vocation, motivation and approaches to learning: a comparative study

Education + Training, 2015

Research paper thumbnail of Acounting and Communicative Apprehension: Comparative Study on CA Levels and Profiles of University Students

Accounting in about communicating. In this regard, important accounting bodies and firms have exp... more Accounting in about communicating. In this regard, important accounting bodies and firms have expressed their opinion, based on results from research carried out, advocating greater emphasis in the development of communication skills throughout accounting degrees. As a consequence, an increasing number of accounting programs are including communication skills as educational objectives. integrating activities in order to improve these skills. However,

Research paper thumbnail of OPTICS; ATOMS and MOLECULES; SPECTROSCOPY; PHOTON DETECTORS

... 2312 Plasma emission tomographic reconstruction in the large helical device Y. Liu, A. Yu. ..... more ... 2312 Plasma emission tomographic reconstruction in the large helical device Y. Liu, A. Yu. ... 2418 Thermal conductivity calibration for hot wire based dc scanning thermal microscopy Stéphane Lefe`vre, Sebastian Volz, Jean-Bernard Saulnier ... Zemb, O. Taché, F. Né, and O. Spalla ...

Research paper thumbnail of Self-concept in communication skills and communication apprehension: A comparative study of students' profiles at the new business and economics area degrees | Autoconcepto en capacidades de comunicación y aprensión: Un estudio comparativo de los estudiantes en los nuevos grados del área de Cienc...

Research paper thumbnail of Electronic work-function calculations of polycrystalline metal surfaces revisited

Physical Review B, 2001

Electronic work-function calculations of polycrystalline metal surfaces revisited. Tomasz Durakie... more Electronic work-function calculations of polycrystalline metal surfaces revisited. Tomasz Durakiewicz 1 * , Stanislaw Halas 2 , Al Arko 1 , John J. Joyce 1 , and Dave P. Moore 1 1 Los Alamos National Laboratory, Mailstop K764 ...

Research paper thumbnail of Localized and Itinerant States in Pu Materials

MRS Proceedings, 2005

ABSTRACT The electronic structure of Pu materials is examined using photoelectron spectroscopy. F... more ABSTRACT The electronic structure of Pu materials is examined using photoelectron spectroscopy. For delta-phase Pu metal as well as PuCoGa5 and PuIn3, the 5f electrons appear to be at the threshold between localized and itinerant character. A mixed level model computational scheme is used which results in non-magnetic solutions for the electronic structure and agrees well with the photoemission measurements. Several other computational schemes are assessed against photoemission results for delta Pu. Additional insight is provided by O2 and H2 dosing of the delta Pu samples and consideration of surface effects. The experimental and computational results are consistent with the 5f electrons in Pu materials exhibiting a dual nature with some fraction of the 5f levels localized and not participating in the bonding while the other fraction of 5f character is involved in bonding and hybridization with the conduction electrons.

Research paper thumbnail of Communication apprehension and communication self‐efficacy in accounting students

Asian Review of Accounting, 2013

ABSTRACT Purpose ‐ The purpose of this paper is to establish a link between communication apprehe... more ABSTRACT Purpose ‐ The purpose of this paper is to establish a link between communication apprehension and communication self-efficacy in accounting students. Design/methodology/approach ‐ This is achieved by the use of two questionnaires jointly distributed to the students involved. The Personal Report of Communication Apprehension (PRCA-24) developed by McCroskey to measure oral communication apprehension[1] (OCA) and the instrument for written communication apprehension (WCA) developed by Daly and Miller and a questionnaire to measure communication self-efficacy. This had been developed using the guidelines set out by Bandura and was designed to measure two constructs: oral communication self-efficacy, and written communication self-efficacy. Findings ‐ The two separate statistical tests to identify the connection between the two concepts both indicated the existence of a strong relationship between the two. This was shown not only in the overall relationship between communication apprehension and self-efficacy but also equally strongly in their constituent components. Practical implications ‐ The existence of this relationship is important because it provides a possible development in terms of understanding the barrier to the development of communication skills and also indicates a possible redirection to alleviate and remove the barrier. In order for accountants to meet future challenges, there is substantial evidence that the development of communication skills will be vital. Originality/value ‐ This paper draws the conclusion that in the future consideration needs to be given to incorporating into the pedagogy of accounting education, especially in those areas involving the development of communication skills, approaches that increase self-efficacy.

Research paper thumbnail of Accounting Students and Communication Apprehension: A Study of Spanish and UK Students

European Accounting Review, 2007

Accounting is about measuring and communicating. Accounting bodies and employers have expressed o... more Accounting is about measuring and communicating. Accounting bodies and employers have expressed opinions, which have been supported by research results, advocating that greater emphasis is placed on the development of communication skills throughout the education ...

Research paper thumbnail of Quality in higher education: from monitoring to management

Quality Assurance in Education, 2003

... The Authors. John Cullen, John Cullen is Professor of Management Accounting, at Sheffield Hal... more ... The Authors. John Cullen, John Cullen is Professor of Management Accounting, at Sheffield Hallam University, Sheffield, UK. John Joyce, John Joyce is a Principal Lecturer in Management Accounting at Sheffield Hallam University, Sheffield, UK. ...

Research paper thumbnail of Direct Observation of Itinerant Magnetism in the 5f-Electron System UTe

Physical Review Letters, 2004

Our electron photoemission experiments demonstrate that the magnetization of the ferromagnetic st... more Our electron photoemission experiments demonstrate that the magnetization of the ferromagnetic state of UTe is proportional to the binding energy of the hybridized band centered around 50 meV below E F . This proportionality is direct evidence that the ferromagnetism of UTe is itinerant; i.e., the 5f electrons are not fully localized close to the atomic core. This mechanism of itinerant ferromagnetism differs from the traditional picture for 5f-electron magnetism in an essential and a novel way. We propose a simple model for the observed proportionality between the temperature dependence of the magnetization and the binding energy of the hybridized band near E F . This model allows us to estimate the effective magnetic interaction and to identify signatures of itinerant ferromagnetism in other materials.

Research paper thumbnail of Spectral properties of δ-plutonium: Sensitivity to 5f occupancy