F. Mazaleyrat | ENS Cachan (original) (raw)

Papers by F. Mazaleyrat

Research paper thumbnail of Induced Anisotropy and Magnetic Properties at Elevated Temperatures of Co-Substituted Finemet Alloys

NATO Science Series, 2000

ABSTRACT

Research paper thumbnail of Thermomagnetic transitions in two-phase nanostructured materials

IEEE Transactions on Magnetics

ABSTRACT

Research paper thumbnail of Effet de la température et du temps de frittage sur les propriétés du ferrite NiCuZn :Co fritté avec le procédé Spark Plasma Sintering ( SPS ) et réalisation d'une inductance intégrès

Research paper thumbnail of High frequency rotational losses in different Soft Magnetic Composites (SMC)

Journal of Applied Physics

Research paper thumbnail of A computationally effective dynamic hysteresis model taking into account skin effect in magnetic laminations

Physica B: Condensed Matter, 2014

We propose a simplified dynamic hysteresis model for the prediction of magnetization behavior of ... more We propose a simplified dynamic hysteresis model for the prediction of magnetization behavior of electrical steel up to high frequencies, taking into account the skin effect. This model has the advantage of predicting the hysteresis loop and loss behavior versus frequency with the same accuracy provided by the Dynamic Preisach Model with a largely reduced computational burden. It is here compared to experimental results obtained in Fe-Si laminations under sinusoidal flux up to 2 kHz.

Research paper thumbnail of Permeability of soft magnetic composites elaborated from flakes of nanocrystalline ribbons

IEEE International Digest of Technical Papers on Magnetics Conference, 2002

ABSTRACT Summary form only given. Finemet composites were made by cold pressing powder with resin... more ABSTRACT Summary form only given. Finemet composites were made by cold pressing powder with resin . The initial permeability of samples was measured by means of an impedance analyzer up to 1.8 GHz. The permeability of powder cores is usually modeled using the nonmagnetic grain boundary model (NMGB) which is improved by assuming the distribution of particles on a flat body centered-like lattice.

Research paper thumbnail of Analytical Model of the Magnetostrictive Ribbon Shape Resonator Frequency Response

Sensor Letters, 2011

ABSTRACT

Research paper thumbnail of Magnetic Decoupling in Soft Magnetic Nanocrystalline Alloys

NATO Science Series, 2005

... The same behaviour of Hc was also observed for NANOPERM (Fe84.5Nb2Zr4B8.5Cu1) [11]. 3. DISCUS... more ... The same behaviour of Hc was also observed for NANOPERM (Fe84.5Nb2Zr4B8.5Cu1) [11]. 3. DISCUSSION ... Phys. 84, 6773. [4] Gomez-Polo, C., Marin, P., Pasqual, L., Hernando, A., and Vazquez, M. (2001), Phys. Rev. B 65, 024433. [5] Herzer, G., (1989) IEEE Trans. Magn. ...

Research paper thumbnail of Synthesis and Processing of Metallic Nano-Powders for the Study of their Mechanical and Magnetic Properties

Materials Science Forum, 2003

Research paper thumbnail of Films minces ultradoux pour la réalisation de microcapteurs GMI

Research paper thumbnail of Magnetic Materials 2005408 Semianalytical and Analytical Formulas for the Classical Loss in Granular Materials With Rectangular and Elliptical Grain Shapes

Research paper thumbnail of Mesures magnétiques: Mesurage des propriétés magnétiques des matériaux

Research paper thumbnail of Computation of classical loss component in soft magnetic composites

Research paper thumbnail of Influence of Mn addition on magnetic and structural properties of barium hexaferrite

AIP Conference Proceedings, 2013

Two-phase nano-powders based on Ba hexaferrite with addition of Mn have been obtained by a sol-ge... more Two-phase nano-powders based on Ba hexaferrite with addition of Mn have been obtained by a sol-gel autocombustion method. Composition dependence of magnetic and structural properties has been studied using magnetic measurements, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The observed decrease of saturation magnetization and coercivity with increase of Mn content is mainly attributed to the presence of Fe oxide as a result of Ba depletion. SEM images show chemically homogeneous, non-regular shaped agglomerated nano-particles (50-200 nm).

Research paper thumbnail of Preparation and characterization of Fe-Si-B thin films

Solid State Physics, Vol 57, 2013

Thickness dependence of structural and magnetic properties of Fe 79 Si 8 B 13 films has been stud... more Thickness dependence of structural and magnetic properties of Fe 79 Si 8 B 13 films has been studied using magnetic measurements, X-ray diffraction (XRD) and scanning electron microscopy (SEM). Prepared films exhibit the presence of nanocrystalline α-Fe phase embedded in amorphous matrix. Magnetic measurements show their homogeneous nature (within film plane). Direction perpendicular to film plane is the hard direction of magnetization. A cross-sectional SEM measurement provides film thickness. SEM also reveals the granular structure of the films.

Research paper thumbnail of An Approach of Thermal Dependence of Magnetization in Two-Phase Nanocrystalline Alloys

Materials Science Forum, 1998

ABSTRACT

Research paper thumbnail of Magnetic and hyperfine properties of chemically synthesized nanocomposites of (Al2O3)x(Ni0.2Zn0.6Cu0.2Fe2O4)(1−x) (x=0.15,0.30,0.45)

Solid State Communications, 2007

(Al2O3)x(Ni0.2Zn0.6Cu0.2Fe2O4)(1−x) (x=0.15,0.30,0.45) nanocomposites were synthesized by copreci... more (Al2O3)x(Ni0.2Zn0.6Cu0.2Fe2O4)(1−x) (x=0.15,0.30,0.45) nanocomposites were synthesized by coprecipitation and sol–gel methods. The as-prepared samples were annealed at 400 ∘C to obtain the desired nanosystems. Particle sizes and crystallographic phases of the magnetic nanoparticles were evaluated from XRD and TEM observations. TEM observations revealed the formation of nanocrystalline phase in the amorphous matrix of aluminium oxide. High resolution TEM also hints that some nanoparticles

Research paper thumbnail of Study of magnetoimpedance effect in Co–Fe–Si–B glass-covered microwires

Sensors and Actuators A: Physical, 2006

Thermal annealing, ac drive current and frequency dependence of magnetoimpedance (MI) effect in a... more Thermal annealing, ac drive current and frequency dependence of magnetoimpedance (MI) effect in amorphous Co68.25Fe4.5Si12.25B15 glass-covered microwires is reported. Thermal annealing affects the circular permeability of the circumferentional domain structure thus modifying (influencing) the maximum magnetoimpedance ratio (ΔZ/Z)max and its sensitivity to applied magnetic field S. Reduction of S after annealing is attributed to the reduced value of (ΔZ/Z)max. Maximum

Research paper thumbnail of Effect of annealing on magnetic and magnetotransport properties of Fe 84 Zr 3.5 Nb 3.5 Cu 1 B 8 ribbons

physica status solidi (a), 2008

Research paper thumbnail of Influence of Co content and thermal annealing on structural, magnetic and magneto elastic properties of nanocrystalline Fe–Co–Nb–B alloys

Physica B: Condensed Matter, 2010

Structural, magnetic and magneto elastic properties of the nanocrystalline Fe 84-x Co x Nb 7 B 9 ... more Structural, magnetic and magneto elastic properties of the nanocrystalline Fe 84-x Co x Nb 7 B 9 (x¼ 17, 25, 33) alloys have been studied using differential scanning calorimetry, X-ray diffraction, hysteresis and magnetostrictive measurements. Successive addition of Co reduces the stability of the alloys against the crystallization and also affects the structural, magnetic and magneto elastic properties. Observed magnetic behaviour suggests that in the coercive field exhibits for the increase of Co content in the alloy there is a changeover from third power dependence to sixth power dependence on grain size, ascribed to the presence of annealing induced anisotropies. Both experimentally obtained and estimated values of the saturation magnetostriction constant shows noticeable changes with increase in the annealing temperature and Co content in the parent alloy due to the increase of volume fraction of the nanograins, stresses and grain growth. Co content in nanocrystalline bcc Fe-Co phase ranges between 10-66%; whereas volume fraction of nanocrystalline phase and average grain diameter is in the range 15-70% and 8-20 nm, respectively.

Research paper thumbnail of Induced Anisotropy and Magnetic Properties at Elevated Temperatures of Co-Substituted Finemet Alloys

NATO Science Series, 2000

ABSTRACT

Research paper thumbnail of Thermomagnetic transitions in two-phase nanostructured materials

IEEE Transactions on Magnetics

ABSTRACT

Research paper thumbnail of Effet de la température et du temps de frittage sur les propriétés du ferrite NiCuZn :Co fritté avec le procédé Spark Plasma Sintering ( SPS ) et réalisation d'une inductance intégrès

Research paper thumbnail of High frequency rotational losses in different Soft Magnetic Composites (SMC)

Journal of Applied Physics

Research paper thumbnail of A computationally effective dynamic hysteresis model taking into account skin effect in magnetic laminations

Physica B: Condensed Matter, 2014

We propose a simplified dynamic hysteresis model for the prediction of magnetization behavior of ... more We propose a simplified dynamic hysteresis model for the prediction of magnetization behavior of electrical steel up to high frequencies, taking into account the skin effect. This model has the advantage of predicting the hysteresis loop and loss behavior versus frequency with the same accuracy provided by the Dynamic Preisach Model with a largely reduced computational burden. It is here compared to experimental results obtained in Fe-Si laminations under sinusoidal flux up to 2 kHz.

Research paper thumbnail of Permeability of soft magnetic composites elaborated from flakes of nanocrystalline ribbons

IEEE International Digest of Technical Papers on Magnetics Conference, 2002

ABSTRACT Summary form only given. Finemet composites were made by cold pressing powder with resin... more ABSTRACT Summary form only given. Finemet composites were made by cold pressing powder with resin . The initial permeability of samples was measured by means of an impedance analyzer up to 1.8 GHz. The permeability of powder cores is usually modeled using the nonmagnetic grain boundary model (NMGB) which is improved by assuming the distribution of particles on a flat body centered-like lattice.

Research paper thumbnail of Analytical Model of the Magnetostrictive Ribbon Shape Resonator Frequency Response

Sensor Letters, 2011

ABSTRACT

Research paper thumbnail of Magnetic Decoupling in Soft Magnetic Nanocrystalline Alloys

NATO Science Series, 2005

... The same behaviour of Hc was also observed for NANOPERM (Fe84.5Nb2Zr4B8.5Cu1) [11]. 3. DISCUS... more ... The same behaviour of Hc was also observed for NANOPERM (Fe84.5Nb2Zr4B8.5Cu1) [11]. 3. DISCUSSION ... Phys. 84, 6773. [4] Gomez-Polo, C., Marin, P., Pasqual, L., Hernando, A., and Vazquez, M. (2001), Phys. Rev. B 65, 024433. [5] Herzer, G., (1989) IEEE Trans. Magn. ...

Research paper thumbnail of Synthesis and Processing of Metallic Nano-Powders for the Study of their Mechanical and Magnetic Properties

Materials Science Forum, 2003

Research paper thumbnail of Films minces ultradoux pour la réalisation de microcapteurs GMI

Research paper thumbnail of Magnetic Materials 2005408 Semianalytical and Analytical Formulas for the Classical Loss in Granular Materials With Rectangular and Elliptical Grain Shapes

Research paper thumbnail of Mesures magnétiques: Mesurage des propriétés magnétiques des matériaux

Research paper thumbnail of Computation of classical loss component in soft magnetic composites

Research paper thumbnail of Influence of Mn addition on magnetic and structural properties of barium hexaferrite

AIP Conference Proceedings, 2013

Two-phase nano-powders based on Ba hexaferrite with addition of Mn have been obtained by a sol-ge... more Two-phase nano-powders based on Ba hexaferrite with addition of Mn have been obtained by a sol-gel autocombustion method. Composition dependence of magnetic and structural properties has been studied using magnetic measurements, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The observed decrease of saturation magnetization and coercivity with increase of Mn content is mainly attributed to the presence of Fe oxide as a result of Ba depletion. SEM images show chemically homogeneous, non-regular shaped agglomerated nano-particles (50-200 nm).

Research paper thumbnail of Preparation and characterization of Fe-Si-B thin films

Solid State Physics, Vol 57, 2013

Thickness dependence of structural and magnetic properties of Fe 79 Si 8 B 13 films has been stud... more Thickness dependence of structural and magnetic properties of Fe 79 Si 8 B 13 films has been studied using magnetic measurements, X-ray diffraction (XRD) and scanning electron microscopy (SEM). Prepared films exhibit the presence of nanocrystalline α-Fe phase embedded in amorphous matrix. Magnetic measurements show their homogeneous nature (within film plane). Direction perpendicular to film plane is the hard direction of magnetization. A cross-sectional SEM measurement provides film thickness. SEM also reveals the granular structure of the films.

Research paper thumbnail of An Approach of Thermal Dependence of Magnetization in Two-Phase Nanocrystalline Alloys

Materials Science Forum, 1998

ABSTRACT

Research paper thumbnail of Magnetic and hyperfine properties of chemically synthesized nanocomposites of (Al2O3)x(Ni0.2Zn0.6Cu0.2Fe2O4)(1−x) (x=0.15,0.30,0.45)

Solid State Communications, 2007

(Al2O3)x(Ni0.2Zn0.6Cu0.2Fe2O4)(1−x) (x=0.15,0.30,0.45) nanocomposites were synthesized by copreci... more (Al2O3)x(Ni0.2Zn0.6Cu0.2Fe2O4)(1−x) (x=0.15,0.30,0.45) nanocomposites were synthesized by coprecipitation and sol–gel methods. The as-prepared samples were annealed at 400 ∘C to obtain the desired nanosystems. Particle sizes and crystallographic phases of the magnetic nanoparticles were evaluated from XRD and TEM observations. TEM observations revealed the formation of nanocrystalline phase in the amorphous matrix of aluminium oxide. High resolution TEM also hints that some nanoparticles

Research paper thumbnail of Study of magnetoimpedance effect in Co–Fe–Si–B glass-covered microwires

Sensors and Actuators A: Physical, 2006

Thermal annealing, ac drive current and frequency dependence of magnetoimpedance (MI) effect in a... more Thermal annealing, ac drive current and frequency dependence of magnetoimpedance (MI) effect in amorphous Co68.25Fe4.5Si12.25B15 glass-covered microwires is reported. Thermal annealing affects the circular permeability of the circumferentional domain structure thus modifying (influencing) the maximum magnetoimpedance ratio (ΔZ/Z)max and its sensitivity to applied magnetic field S. Reduction of S after annealing is attributed to the reduced value of (ΔZ/Z)max. Maximum

Research paper thumbnail of Effect of annealing on magnetic and magnetotransport properties of Fe 84 Zr 3.5 Nb 3.5 Cu 1 B 8 ribbons

physica status solidi (a), 2008

Research paper thumbnail of Influence of Co content and thermal annealing on structural, magnetic and magneto elastic properties of nanocrystalline Fe–Co–Nb–B alloys

Physica B: Condensed Matter, 2010

Structural, magnetic and magneto elastic properties of the nanocrystalline Fe 84-x Co x Nb 7 B 9 ... more Structural, magnetic and magneto elastic properties of the nanocrystalline Fe 84-x Co x Nb 7 B 9 (x¼ 17, 25, 33) alloys have been studied using differential scanning calorimetry, X-ray diffraction, hysteresis and magnetostrictive measurements. Successive addition of Co reduces the stability of the alloys against the crystallization and also affects the structural, magnetic and magneto elastic properties. Observed magnetic behaviour suggests that in the coercive field exhibits for the increase of Co content in the alloy there is a changeover from third power dependence to sixth power dependence on grain size, ascribed to the presence of annealing induced anisotropies. Both experimentally obtained and estimated values of the saturation magnetostriction constant shows noticeable changes with increase in the annealing temperature and Co content in the parent alloy due to the increase of volume fraction of the nanograins, stresses and grain growth. Co content in nanocrystalline bcc Fe-Co phase ranges between 10-66%; whereas volume fraction of nanocrystalline phase and average grain diameter is in the range 15-70% and 8-20 nm, respectively.