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Crystal Structural Phase Transition Induced by Magnetic Field

Research Project

Project/Area Number 12640359
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体物性Ⅱ(磁性・金属・低温)
Research InstitutionKeio University

Principal Investigator

TAJIMA Keisuke  Keio University, Science and Technology, Professor, 理工学部, 教授 (70004439)

Co-Investigator(Kenkyū-buntansha) WAKABAYASHI Nobuyoshi  Keio University, Science and Technology, Professor (retired), 理工学部, 教授 (20146575)
SHIMOMURA Susumu  Keio University, Science and Technology, Assistant Professor, 理工学部, 専任講師 (00260216)
Project Period (FY) 2000 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2003: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2002: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2001: ¥500,000 (Direct Cost: ¥500,000)
Keywordsitinerant electron magnetism / magnetic phase transition / magnetic phase diagram / X-ray diffraction / magnetovolume effect / flustration / metamagnetism / 希土類金属 / 四重極秩序 / X線回析 / ペロフスカイト化合物 / 遍歴電子磁性体 / マンガン酸化物
Research Abstract

Magneto-volume effect in itinerant electron metamagnetic system has been investigated by means of x-ray diffraction under magnetic field and magnetization measurements. Results are compared with those in the localized spin system and characteristic properties in an itinerant system can be discussed.
1) The magnetovolume effect in Laves phase compound Lu(CoGa)_2 which is known as a typical itinerant electron system has been investigated. Results can be well interpreted by the spin fluctuation theory.
2) The first order magnetic phase transition in (FeMn)_2P is also described by the itinerant electron metamagnetic transition which is due to the interaction between two magnetic sub-bands. Results of the measurement for magnetovolume effect suggest that the band structure of paramagnetic and ferromagnetic states is different, which are expected to extend the theoretical understanding itinerant electron metamagnetism in this material.

Report

(5 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] H.Ohsumi: "Magnetoelastic effect in Ho studied by x-ray diffraction."Journal of the Physical Society of Japan. 71. 1732-1739 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Tajima: "Magnetic phase transitions and lattice changes in rare earth metals studied by x-ray diffraction under magnetic field."Materials Transactions JIM. 8. 1040-1045 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 田島圭介: "X線回析で眺めた希土類金属の磁歪"日本応用磁気学会誌. 24. 110-115 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Hayashi: "X-ray diffraction studies on magneto-volume effect and the first order phase transition in Lu(Co1-xGax)2."Journal of the Physical Society of Japan. 69. 4013-4017 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Ohsumi: "Magnetoelastic effect in Ho studied by x-ray diffraction."J.Phys.Soc.Jpn.. 71. 1732-1739 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Tajima, H.Ohsurni, G.Masada: "Magnetic phase transitions and lattice changes in rare earth metals studied by x-ray diffraction under magnetic field."Mater.Trans., JIM. 8. 1040-1045 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Tajima, H.Ohsumi, G.Masada: "Magnetostriction in rare earth metals studied by X-ray diffraction."Nihon ouyou jikigakkaishi (in Japanese). 24. 110-115 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] K.Hayashi, K.Tajima, H.Saito, K.Fukamichi: "X-ray diffraction studies on magneto-volume effect and the first order phase transition in Lu(Co_<1-x>Ga_x)_2."J.Phys.Soc.Jpn.. 69. 4013-4017 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] S.Shimomura, T.Tozegawa, K.Tajima, N.Wakabayashi, N.Ikeda, T.Shobu, Y.Noda, T.Tomioka, Y.Tokura: "X-ray diffuse scattering study on charged-localized states of Pr_<1-x>Ca_xMnO_3 (x=0.35, 0.4, 0.5)"Phys.Rev.. B62. 3875-3878 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] S.Shimomura, T.Tonegawa, K.Torashima, K.Tajima, N.Wakabayashi, H.Kuwahara, Y.Tomioka, Y.Tokura: "X-ray Diffuse Scattering from (Nd_<1-y>Sm_y)_<1-x>Sr_xMnO_3 and Pr_<1-x>Ca_xMn0O_3"AIP Conference Proceedings. 554. 437-441 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Ohsumi: "Magnetoelastic Effect in Ho Studied by X-ray Diffraction"Journal of the Physical Society of Japan. vol.71. 1732-1739 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] N.Wakabayashi et al.: "Short-range Polaron Correlations in the ferromagnetic La_<1-x>Ca_xMnO_3"Physical Review Letters. 85. 2553-2556 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] S.Shimomura et al.: "X-ray diffuse scattering from (Nd_<1-y>Sm_y)_<1-x>Sr_xMnO_3"AIP conference proceedings. 554. 437-441 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Tajima: "Magnetostriction of Dy and Ho studied by x-ray diffraction."Journal of Alloys and Compounds. vol.303-304. 276-279 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Tajima: "Magnetic phase transitions and lattice changes in rare earth metals studied by x-ray diffraction under magnetic field."Materials Transactions, JIM. vol.8. 1040-1045 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] K.Hayashi: "X-ray diffraction studies on magneto-volume effect and the first order phase transition in Lu (Co 1_<-x>Ga_x) _2"Journal of Physical Society Japan. vol.69. 4013-4017 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Shimomura: "X-ray diffuse scattering study on charged-localized states of Pr_<1-x>Ca_xMnO_3 (x=0.35,0.4,0.5)"Physical Review B. vol.62. 3875-3878 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 田島圭介: "X線回折で眺めた希土類金属の磁歪"日本応用磁気学会誌. 24巻. 110-116 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2001-04-01   Modified: 2020-05-15  

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