Takanori Tsutaoka - Academia.edu (original) (raw)

Papers by Takanori Tsutaoka

Research paper thumbnail of Pressure effect on the electrical properties of R7Rh3 (R = Dy and Y)

Journal of Magnetism and Magnetic Materials, 2007

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Research paper thumbnail of 「地球科学と資源・エネルギー」をテーマとする科学リテラシーの育成をめざした教材開発(II)

The Annals of Educational Research, Mar 24, 2011

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Research paper thumbnail of Magnetic and transport properties of Ho7Rh3 (Selected papers related to neutron diffraction studies by the use of KUR-TAS)

Kurri Tr, Feb 1, 2005

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Research paper thumbnail of Magnetic and Transport Properties of (YxCe1-x)7Rh3

Acta Phys Pol B, 2003

Magnetic and transport properties of (YxCe1-x)7Rh3 have been studied by measuring magnetization, ... more Magnetic and transport properties of (YxCe1-x)7Rh3 have been studied by measuring magnetization, magnetic susceptibility and electrical resistivity. Ce7Rh3 is a metal ferromagnet and Y7Rh3 is a semimetallic Pauli paramagnet. In (YxCe1-x)7Rh3, ferromagnetic phase disappears at about x = 0.4. Intermediate valence state can exist in high Y concentration range above x = 0.5. In this range, electrical properties can be realized by the Kondo scattering in semimetallic band structure.

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Research paper thumbnail of 「地球科学と資源・エネルギー」をテーマとする科学リテラシーの育成をめざした教材開発(III)

The Annals of Educational Research, Mar 26, 2012

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Research paper thumbnail of Magnetic and transport properties of R5Ge3 (R=Gd,Tb) single crystals

Journal of Magnetism and Magnetic Materials, May 1, 2004

Single crystals of Gd5Ge3 and Tb5Ge3 have been successfully grown by the Czochralski method. Gd5G... more Single crystals of Gd5Ge3 and Tb5Ge3 have been successfully grown by the Czochralski method. Gd5Ge3 shows antiferromagnetic below TN=76K and has no magnetic anisotropy in the paramagnetic susceptibility; another antiferromagnetic phase transition has been found at Tt=52K. In contrast, Tb5Ge3 shows a large magnetic anisotropy and antiferromagnetic below TN=79K. In antiferromagnetic phase, magnetic moments tend to be aligned in the c-plane for both Gd5Ge3 and Tb5Ge3.

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Research paper thumbnail of 実験データの科学的解釈に関する基礎研究(2) : グラフの解釈を活かした授業を探る

The Annals of Educational Research, Mar 31, 2010

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Research paper thumbnail of 「地球科学と資源・エネルギー」をテーマとする科学リテラシーの育成をめざした教材開発

The Annals of Educational Research, Mar 31, 2010

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Research paper thumbnail of 中学校におけるエネルギー概念形成のための単元開発(I) : 熱エネルギーの変換をテーマとして

The Annals of Educational Research, Mar 20, 2007

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Research paper thumbnail of High pressure synthesis and magnetic properties of Dy 7Rh 3 and Tb 7Rh 3 hydrides

J Alloys Compounds, 2007

Intermetallic compounds Tb7Rh3 and Dy7Rh3, which crystallize in Th7Fe3 type hexagonal structure w... more Intermetallic compounds Tb7Rh3 and Dy7Rh3, which crystallize in Th7Fe3 type hexagonal structure with the space group P63mc were hydrogenated under high hydrogen pressure in order to study influence of hydrogen on their structural and magnetic properties.Hydrogen treatment of Tb7Rh3 and Dy7Rh3 even at moderate pressures resulted in formation of hydrides with H/M > 2. The hydrides retained symmetry of parent materials but large lattice expansion has been observed. After release of hydrogen pressure the hydrides were stable and could be kept for long time at normal conditions. Hydrogenation affects strongly magnetic properties of both Tb7Rh3 and Dy7Rh3. Treatment at 100 °C up to 10 kbar (H2) did not cause their amorphisation or decomposition.

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Research paper thumbnail of 教育用高温磁気天秤(I) : 装置の製作および性能試験

Bulletin of the Graduate School of Education Hiroshima University Part Ii Arts and Science Education, Mar 28, 2005

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Research paper thumbnail of Reduction in beam positioning error by modification of dynamic responses in electron beam direct writing system

Journal of Vacuum Science Technology B Microelectronics and Nanometer Structures, Nov 1, 1990

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Research paper thumbnail of Transport properties of Nd 7Ni 3

J Magn Magn Mater, 1998

Electrical resistivity of Nd7Ni3 shows anomalies at the Néel temperature TN = 29 K and the Curie ... more Electrical resistivity of Nd7Ni3 shows anomalies at the Néel temperature TN = 29 K and the Curie temperature Tc = 14 K but does not show any change at the spin reorientation temperature TR = 8.7 K. The thermoelectric power has also broad humps around 250 and 50 K as well as a sharp break at TN and a minimum at 10 K. The corresponding Hall coefficient shows anomalies at TN, Tc and TR, following the Curie—Weiss-law-like behavior above TN.

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Research paper thumbnail of Pressure study of the magnetic and electrical properties of the Eu-Yb alloy system

Physical Review B, Nov 1, 1985

Measurements of the ac magnetic susceptibility, magnetization, and electrical resistivity at hydr... more Measurements of the ac magnetic susceptibility, magnetization, and electrical resistivity at hydrostatic pressures up to 15 kbar and of the thermal expansion were made for the EuxYb1-x alloy system (x<=0.4) in temperatures from 1.6 to 400 K. The paramagnetic-ferromagnetic transition temperature Tc versus pressure p curve for x=0.025 has a maximum near p=1 kbar. For x=0.25, Tc decreases and the ferromagnetic-spin-glass-like transition temperature Tt increases at rates of ΔTc/Δp=-9.5 K/kbar and ΔTt/Δp=+1.7 K/kbar, respectively. The ferromagnetic region disappears near p=2.5 kbar, and above it the paramagnetic-spin-glass-like transition temperature Tg, which is pressure insensitive, appears. The Tg value for x=0.35 decreases initially and increases slowly with increasing p above p=2 kbar at a rate of ΔTg/Δp=+0.15 K/kbar. Both the magnetization in the ferromagnetic concentration range and the value of the ac magnetic susceptibility near Tg in the spin-glass-like state decrease with increasing p. From electrical-resistivity measurements under various pressures, semiconducting character was observed at the ambient pressure for x=0.35 and the transition from semimetallic to semiconducting states appears with increasing p for x=0.025. Thermal expansion shows the large positive volume magnetostriction. These results of the measurements under pressure are discussed on the basis of the Ruderman-Kittel-Kasuya-Yosida interaction by considering that the dominant variable is the number of carriers (electrons or holes) which is strongly controlled by the pressure.

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Research paper thumbnail of 教育用高温磁気天秤(II) : 物質科学教育教材開発のための基礎的研究

Bulletin of the Graduate School of Education Hiroshima University Part Ii Arts and Science Education, Mar 28, 2005

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Research paper thumbnail of Magnetic properties of R 7Rh 3 (R=Tb, Dy and Ho) in high magnetic fields

Physica B, 2001

The high-field magnetization has been studied for the intermetallic compounds R7Rh3 (R=Tb, Dy and... more The high-field magnetization has been studied for the intermetallic compounds R7Rh3 (R=Tb, Dy and Ho) in magnetic fields up to 280 kOe at 1.5 K. In Tb7Rh3, three successive metamagnetic transitions accompanied by a large hysteresis were found. On the other hand, metamagnetic transitions in Ho7Rh3 were identified by small anomalies in the M–H curves. Dy7Rh3 has large magnetic anisotropy and has four metamagnetic transitions with hysteresis. In all these compounds, the magnetization is not saturated even at 280 kOe. The metamagnetic transitions indicate the occurrence of complex magnetic structures in these compounds.

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Research paper thumbnail of Transmission characteristics of laminated structures using negative permittivity and high permittivity materials

2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM), 2015

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Research paper thumbnail of Neutron Diffraction Studies for the Magnetic Structures of Tb7Rh3 (Proceedings of the 1st International Symposium on Advanced Science Research(ASR-2000), Advances in Neutron Scattering Research)

Journal of the Physical Society of Japan, 2001

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Research paper thumbnail of Magnetic and electrical properties of R7Rh3 (R=Gd, Tb, Dy, Ho, Er and Y)

Journal of the Physical Society of Japan, 2001

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Research paper thumbnail of A neutron diffraction study on an Er7Rh3 single crystal

Physica B Condensed Matter, 2006

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Research paper thumbnail of Pressure effect on the electrical properties of R7Rh3 (R = Dy and Y)

Journal of Magnetism and Magnetic Materials, 2007

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Research paper thumbnail of 「地球科学と資源・エネルギー」をテーマとする科学リテラシーの育成をめざした教材開発(II)

The Annals of Educational Research, Mar 24, 2011

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Research paper thumbnail of Magnetic and transport properties of Ho7Rh3 (Selected papers related to neutron diffraction studies by the use of KUR-TAS)

Kurri Tr, Feb 1, 2005

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Research paper thumbnail of Magnetic and Transport Properties of (YxCe1-x)7Rh3

Acta Phys Pol B, 2003

Magnetic and transport properties of (YxCe1-x)7Rh3 have been studied by measuring magnetization, ... more Magnetic and transport properties of (YxCe1-x)7Rh3 have been studied by measuring magnetization, magnetic susceptibility and electrical resistivity. Ce7Rh3 is a metal ferromagnet and Y7Rh3 is a semimetallic Pauli paramagnet. In (YxCe1-x)7Rh3, ferromagnetic phase disappears at about x = 0.4. Intermediate valence state can exist in high Y concentration range above x = 0.5. In this range, electrical properties can be realized by the Kondo scattering in semimetallic band structure.

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Research paper thumbnail of 「地球科学と資源・エネルギー」をテーマとする科学リテラシーの育成をめざした教材開発(III)

The Annals of Educational Research, Mar 26, 2012

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Research paper thumbnail of Magnetic and transport properties of R5Ge3 (R=Gd,Tb) single crystals

Journal of Magnetism and Magnetic Materials, May 1, 2004

Single crystals of Gd5Ge3 and Tb5Ge3 have been successfully grown by the Czochralski method. Gd5G... more Single crystals of Gd5Ge3 and Tb5Ge3 have been successfully grown by the Czochralski method. Gd5Ge3 shows antiferromagnetic below TN=76K and has no magnetic anisotropy in the paramagnetic susceptibility; another antiferromagnetic phase transition has been found at Tt=52K. In contrast, Tb5Ge3 shows a large magnetic anisotropy and antiferromagnetic below TN=79K. In antiferromagnetic phase, magnetic moments tend to be aligned in the c-plane for both Gd5Ge3 and Tb5Ge3.

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Research paper thumbnail of 実験データの科学的解釈に関する基礎研究(2) : グラフの解釈を活かした授業を探る

The Annals of Educational Research, Mar 31, 2010

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Research paper thumbnail of 「地球科学と資源・エネルギー」をテーマとする科学リテラシーの育成をめざした教材開発

The Annals of Educational Research, Mar 31, 2010

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Research paper thumbnail of 中学校におけるエネルギー概念形成のための単元開発(I) : 熱エネルギーの変換をテーマとして

The Annals of Educational Research, Mar 20, 2007

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Research paper thumbnail of High pressure synthesis and magnetic properties of Dy 7Rh 3 and Tb 7Rh 3 hydrides

J Alloys Compounds, 2007

Intermetallic compounds Tb7Rh3 and Dy7Rh3, which crystallize in Th7Fe3 type hexagonal structure w... more Intermetallic compounds Tb7Rh3 and Dy7Rh3, which crystallize in Th7Fe3 type hexagonal structure with the space group P63mc were hydrogenated under high hydrogen pressure in order to study influence of hydrogen on their structural and magnetic properties.Hydrogen treatment of Tb7Rh3 and Dy7Rh3 even at moderate pressures resulted in formation of hydrides with H/M > 2. The hydrides retained symmetry of parent materials but large lattice expansion has been observed. After release of hydrogen pressure the hydrides were stable and could be kept for long time at normal conditions. Hydrogenation affects strongly magnetic properties of both Tb7Rh3 and Dy7Rh3. Treatment at 100 °C up to 10 kbar (H2) did not cause their amorphisation or decomposition.

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Research paper thumbnail of 教育用高温磁気天秤(I) : 装置の製作および性能試験

Bulletin of the Graduate School of Education Hiroshima University Part Ii Arts and Science Education, Mar 28, 2005

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Research paper thumbnail of Reduction in beam positioning error by modification of dynamic responses in electron beam direct writing system

Journal of Vacuum Science Technology B Microelectronics and Nanometer Structures, Nov 1, 1990

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Research paper thumbnail of Transport properties of Nd 7Ni 3

J Magn Magn Mater, 1998

Electrical resistivity of Nd7Ni3 shows anomalies at the Néel temperature TN = 29 K and the Curie ... more Electrical resistivity of Nd7Ni3 shows anomalies at the Néel temperature TN = 29 K and the Curie temperature Tc = 14 K but does not show any change at the spin reorientation temperature TR = 8.7 K. The thermoelectric power has also broad humps around 250 and 50 K as well as a sharp break at TN and a minimum at 10 K. The corresponding Hall coefficient shows anomalies at TN, Tc and TR, following the Curie—Weiss-law-like behavior above TN.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Pressure study of the magnetic and electrical properties of the Eu-Yb alloy system

Physical Review B, Nov 1, 1985

Measurements of the ac magnetic susceptibility, magnetization, and electrical resistivity at hydr... more Measurements of the ac magnetic susceptibility, magnetization, and electrical resistivity at hydrostatic pressures up to 15 kbar and of the thermal expansion were made for the EuxYb1-x alloy system (x<=0.4) in temperatures from 1.6 to 400 K. The paramagnetic-ferromagnetic transition temperature Tc versus pressure p curve for x=0.025 has a maximum near p=1 kbar. For x=0.25, Tc decreases and the ferromagnetic-spin-glass-like transition temperature Tt increases at rates of ΔTc/Δp=-9.5 K/kbar and ΔTt/Δp=+1.7 K/kbar, respectively. The ferromagnetic region disappears near p=2.5 kbar, and above it the paramagnetic-spin-glass-like transition temperature Tg, which is pressure insensitive, appears. The Tg value for x=0.35 decreases initially and increases slowly with increasing p above p=2 kbar at a rate of ΔTg/Δp=+0.15 K/kbar. Both the magnetization in the ferromagnetic concentration range and the value of the ac magnetic susceptibility near Tg in the spin-glass-like state decrease with increasing p. From electrical-resistivity measurements under various pressures, semiconducting character was observed at the ambient pressure for x=0.35 and the transition from semimetallic to semiconducting states appears with increasing p for x=0.025. Thermal expansion shows the large positive volume magnetostriction. These results of the measurements under pressure are discussed on the basis of the Ruderman-Kittel-Kasuya-Yosida interaction by considering that the dominant variable is the number of carriers (electrons or holes) which is strongly controlled by the pressure.

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Research paper thumbnail of 教育用高温磁気天秤(II) : 物質科学教育教材開発のための基礎的研究

Bulletin of the Graduate School of Education Hiroshima University Part Ii Arts and Science Education, Mar 28, 2005

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Research paper thumbnail of Magnetic properties of R 7Rh 3 (R=Tb, Dy and Ho) in high magnetic fields

Physica B, 2001

The high-field magnetization has been studied for the intermetallic compounds R7Rh3 (R=Tb, Dy and... more The high-field magnetization has been studied for the intermetallic compounds R7Rh3 (R=Tb, Dy and Ho) in magnetic fields up to 280 kOe at 1.5 K. In Tb7Rh3, three successive metamagnetic transitions accompanied by a large hysteresis were found. On the other hand, metamagnetic transitions in Ho7Rh3 were identified by small anomalies in the M–H curves. Dy7Rh3 has large magnetic anisotropy and has four metamagnetic transitions with hysteresis. In all these compounds, the magnetization is not saturated even at 280 kOe. The metamagnetic transitions indicate the occurrence of complex magnetic structures in these compounds.

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Research paper thumbnail of Transmission characteristics of laminated structures using negative permittivity and high permittivity materials

2015 7th Asia-Pacific Conference on Environmental Electromagnetics (CEEM), 2015

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Research paper thumbnail of Neutron Diffraction Studies for the Magnetic Structures of Tb7Rh3 (Proceedings of the 1st International Symposium on Advanced Science Research(ASR-2000), Advances in Neutron Scattering Research)

Journal of the Physical Society of Japan, 2001

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Research paper thumbnail of Magnetic and electrical properties of R7Rh3 (R=Gd, Tb, Dy, Ho, Er and Y)

Journal of the Physical Society of Japan, 2001

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Research paper thumbnail of A neutron diffraction study on an Er7Rh3 single crystal

Physica B Condensed Matter, 2006

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