Effects of fluctuations on magnetic isotherms of itinerant electron magnets around their critical points

• Project/Area Number: 21540341
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: University of Hyogo
• Principal Investigator: TAKAHASHI Yoshinori 兵庫県立大学, 物質理学研究科, 教授 (90143544)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000); Fiscal Year 2011: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000); Fiscal Year 2010: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2009: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
• Keywords: 磁性 / 遍歴磁性 / スピンゆらぎ / 遍歴電子磁性 / 磁化曲線

Research Abstract

I have been involved in developing the spin fluctuation theory to understand various magnetic properties of itinerant electron magnets. This subject was planned for further developing the theory paying particular attention on magnetization curves around the critical temperature. As a result, I have succeeded in extending the theory that enables our treatments of axial magnetic anisotropies in itinerant magnets even quantitatively. It also brought us a foresight for understanding the metamagnetic transitions observed well around the quantum critical points.

Research Products

• [Journal Article] Magnetic isotherm of itinerant electron magnets? A new approach to itinerant electron metamagnetism (2012)
  • Author(s): Y. Takahashi
  • Journal Title: J. Phys. Conf. Ser. Volume: Vol.344
  • Peer Reviewed
• [Journal Article] Effect of dimensionality crossover on magnetovolume properties of quasi one-dimensional weakly anfiferromagnetic metals (2012)
  • Author(s): N. Hatayama, R. Konno, and Y. Takahashi
  • Journal Title: J. Phys. Conf. Ser. Volume: Vol.344
  • Peer Reviewed
• [Journal Article] Magnetic isotherm of itinerant electron magnets-A new approach to itinerant electron metamagnetism (2012)
  • Author(s): Y.Takahashi
  • Journal Title: J.Phys. : Conf.Ser. Volume: 344
  • Peer Reviewed
• [Journal Article] Interplay between quantum criticality and geometric frustration in Fe_3Mo_3N with stella quadrangula lattice (2011)
  • Author(s): T. Waki, H. Nakamura, 他8名
  • Journal Title: EPL Volume: vol.94 (3) Issue: 3 Pages: 37004-37004
  • DOI: 10.1209/0295-5075/94/37004
  • Peer Reviewed
• [Journal Article] Magnetization process of a narrow gap semiconductor FeSb2 (2010)
  • Author(s): T. Koyama, H. Nakamura, T. Kohara, Y. Takahashi
  • Journal Title: J. Phys. Soc. Jpn. Volume: Vol.79 Issue: 9 Pages: 093704-093704
  • DOI: 10.1143/jpsj.79.093704
  • NAID: 210000108499
  • Peer Reviewed
• [Journal Article] Itinerant Electron Metamagnetism in eta-Carbide-Type Compound Co3Mo3C (2010)
  • Author(s): T. Waki, Y. Umemoto, S. Terazawa, Y. Tabata, A. Kondo, K. Sato, K. Kindo, S. Alchonchel, F. Sapina, Y. Takahashi, and H. Nakamura
  • Journal Title: J. Phys. Soc. Jpn. Volume: Vol.79 Issue: 9 Pages: 093703-093703
  • DOI: 10.1143/jpsj.79.093703
  • Peer Reviewed
• [Journal Article] First-Order Magnetic Phase Transitions in Itinerant Electron Ferromagnets (2010)
  • Author(s): Y. Takahashi
  • Journal Title: J. Phys. Soc. Jpn. Volume: Vol.79 Issue: 8 Pages: 083707-083707
  • DOI: 10.1143/jpsj.79.083707
  • Peer Reviewed
• [Journal Article] 講義ノート:遍歴電子磁性とスピン揺らぎ理論 (2010)
  • Author(s): 高橋慶紀
  • Journal Title: 物性研究 Volume: 94巻 Pages: 531-648
• [Journal Article] First-Order Magnetic Phase Transitions in Itinerant Electron Ferromag nets (2010)
  • Author(s): Y.Takahashi
  • Journal Title: J.Phys.Soc.Jpn. Volume: 79
  • Peer Reviewed
• [Journal Article] Magnetization process of a narrow gap semiconductor FeSb2 (2010)
  • Author(s): T.Koyama
  • Journal Title: J.Phys.Soc.Jpn. Volume: 79
  • Peer Reviewed
• [Journal Article] Itinerant Electron Metamagnetism in eta-Carbide-Type Compound Co3 Mo3C (2010)
  • Author(s): T.Waki
  • Journal Title: J.Phys.Soc.Jpn. Volume: 79
  • Peer Reviewed
• [Presentation] 臨界点近傍の遍歴電子強磁性とスピンゆらぎ (2012)
  • Author(s): 高橋慶紀
  • Organizer: 日本物理学会第61回年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-26
• [Presentation] 臨界点近傍の遍歴電子強磁性とスピンゆらぎ (2012)
  • Author(s): 高橋慶紀
  • Organizer: 日本物理学会第61回年次大会
  • Place of Presentation: 関西学院大学(兵庫県)
  • Year and Date: 2012-03-26
• [Presentation] 異方的スピンゆらぎの遍歴磁性への影響(領域8, 3合同シンポジウム) (2011)
  • Author(s): 高橋慶紀
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-23
• [Presentation] 異方的スピンゆらぎの遍歴磁性への影響(領域8,3合同シンポジウム) (2011)
  • Author(s): 高橋慶紀
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学(富山県)(招待講演)
  • Year and Date: 2011-09-23
• [Presentation] Ising的な遍歴強磁性体の磁気比熱 (2011)
  • Author(s): 高橋慶紀
  • Place of Presentation: 新潟大学
  • Year and Date: 2011-03-25
• [Presentation] Ising的な遍歴強磁性体の磁気比熱 (2011)
  • Author(s): 高橋慶紀
  • Organizer: 日本物理学会第66回年次大会
  • Place of Presentation: Webの講演資料公開サイト(新潟大学で発表の代わり)
  • Year and Date: 2011-03-25
• [Presentation] Fe3Mo3N化合物磁性の交換相互作用行列の波数依存性 (2010)
  • Author(s): 高橋慶紀
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-25
• [Presentation] 異方的遍歴磁性体の自発磁化の温度依存性 (2010)
  • Author(s): 奥田祐希
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-24
• [Presentation] 星型四面体格子のフラストレーションとFe3Mo3Nのスピン液体状態 (2010)
  • Author(s): 中村裕之
  • Organizer: 日本物理学会2010年秋季大会
  • Place of Presentation: 大阪府立大学
  • Year and Date: 2010-09-23
• [Presentation] 異方的遍歴電子磁性体の秩序状態のスピンゆらぎ理論 (2010)
  • Author(s): 高橋慶紀
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-22
• [Presentation] 遍歴磁性体の異方的磁化過程の理論 (2010)
  • Author(s): 奥田祐希
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-20
• [Presentation] Fe3Mo3Nの非フェルミ流体的挙動 (2010)
  • Author(s): 寺澤慎祐
  • Organizer: 日本物理学会第65回年次大会
  • Place of Presentation: 岡山大学
  • Year and Date: 2010-03-20
• [Presentation] 鉄系化合物にみられる弱い遍歴磁性とその理論 (2009)
  • Author(s): 高橋慶紀
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-27
• [Presentation] 鉄系化合物にみられる弱い遍歴磁性とその理論(領域3シンポジウム) (2009)
  • Author(s): 高橋慶紀
  • Organizer: 日本物理学会2009年秋季大会
  • Place of Presentation: 熊本大学
  • Year and Date: 2009-09-27
• [Book] 遍歴磁性とスピンゆらぎ (2012)
  • Author(s): 高橋慶紀、吉村一良
  • Total Pages: 272
• [Book] 遍歴磁性とスピンゆらぎ (2012)
  • Author(s): 高橋慶紀、吉村一良
  • Total Pages: 272
  • Publisher: 内田老鶴圃