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The magnetic interactions between rare-earth and transition elements in the intermetallic compound

Research Project

Project/Area Number 03452035
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 固体物性
Research InstitutionShinshu University

Principal Investigator

NAGAI Hiroyuki (1992)  Shinshu University, Department of Physics., Professor., 理学部, 教授 (60020674)

安達 健五 (1991)  信州大学, 理学部, 教授 (40022991)

Co-Investigator(Kenkyū-buntansha) AMAKO Yasushi  Shinshu University, Department of Physics, Assistant, 理学部, 助手 (90222679)
TERAO Kiyoshi  Shinshu University, Department of Physics, Assistant, 理学部, 助手 (40020664)
YOSHIE Hiroshi  Shinshu University, Department of Physics, Assistant Professor., 理学部, 助教授 (10020661)
永井 寛之  信州大学, 理学部, 教授 (60020674)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1992: ¥1,100,000 (Direct Cost: ¥1,100,000)
KeywordsIntermetallic compound / Coexistence of magnetic interactions / Permanent magnet / Magnetic anisotropy / 希土類元素 / 磁気的相互作用 / 結晶磁気異方性 / 強力磁石
Research Abstract

In the final year, the remain measurements were carried out. According to the electronic resistances of R(Fe,Mn)_<12> where R is the rare earth element, the rapid increase due to the transition to the antiferromagnetic state was observed and explained by the similar method for CrMn alloy. The saturation magnetizations of RMn_<12> are smaller than the expected values for R^<3+> by assuming the antiferromagnetic coupling of Mn atoms. This fact suggests the existence of the strong interaction between R and Mn atoms. The R-Mn interaction was observed by ^<55>Mn NMR in the temperature range between T_C and T_N where T_C (<10K) is the magnetic ordering point of R atoms and T_N ( 100K) is that of Mn atoms. From the Mossbauer effect of ^<57>Fe in R(Fe,Mn)_<12>, The site preference of Fe atom was quantatively obtained. 8f-site is most preferential and 8i-site is hard. In the lower density of Fe , the population rate of Fe (8j/8f) is estimated to be about 30%.
The another object of study is to develop strong ferromagnetic substances. In order to study the basic properties of permanent magnets, the ferromagnetic compound Gd_5Si_4 was selected as a start substance and substituted to increase the magnetic anisotropy. The contribution of R atom to the magnetic anisotropy was also investigated. As a result, the substance with higher Curie temperature was not found. While the magnetic moment per atom was larger than others. The strong permanent magnet is possible at low temperature. The NMR study of R_2Co_<14>B indicates the contribution to the magnetic anisotropy of Co sites. From these results the conditions of the possibility of the strong permanent magnet are pointed out.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (17 results)

All Other

All Publications (17 results)

  • [Publications] Hiroyuki Nagai: "^<59>Co NMR Study of R_3CO Compounds(R=Y,Gd,Tb,Dy)" Journal of Physical Society of Japan. 60. 4388-4389 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Yasushi Amako: "Magnetic Properties of RMn_<12>(R=rare earth)" Journal of magnetism and magnetic materials. 104-107. 1451-1452 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hiroshi Yoshie: "Nuclear magnetic resonance of ^<59>Co on Gd_2Co_7" Journal of magnetism and magnetic materials. 104-107. 1449-1450 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Kazuyoshi Ichinose: "Spin reorientations in(Nd_<1-x>R_c)_2Co_<14>B compounds" Journal of magnetism and magnetic materials. 104-107. 1159-1160 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Yasushi Amako: "Magnetic properties of RMn_<12> Compounds" Proceedings of 2nd ISPMM'92. Suppl.155-158 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hiroyuki Nagai: "The magnetic properties of R(Mn,Fe)_<12> compounds(R=Gd,Tb,Dy,Ho)" Proceedings of 2nd ISPMM'92. Suppl.151-154 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hiroyuki Nagai: "^<59>Co NMR Study of R_3CO Compounds (R=Y,Gd,Tb,Dy)" Journal of Physical Society of Japan. 60. 4388-4389 (1991)

    • Related Report
      1992 Annual Research Report
  • [Publications] Yasushi Amako: "Magnetic Properties of RMn_<12> (R=rare earth)" Journal of magnetism and magretic materials. 104-107. 1451-1452 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Hiroyuki Nagai: "Nuclear magnetic resonance of ^<59>Co on Gd_2CO_7" Journal of magnetism and magnetic materials. 104-107. 1449-1450 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Kazuyoshi Ichinose: "Spin reorientations in (Nd_<1-x>R_x)_2Co_<14>B compounds" Journal of magnetism and magnetic materials. 104-107. 1159-1160 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Yasushi Amako: "Magnetic properties of RMn_<12> Compounds" Proceedings of 2nd ISPMM'92. Suppl.155-158 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] Hiroyuki Nagai: "The magnetic properties of R(mn,Fe)_<12> compounds (R=Gd,Tb,Dy,Ho)" Proceedings of 2nd ISPMM'92. Suppl.151-154 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] 天児 寧: "Magnetic properties of RMn_<12>(R=rare earth)" Joural of Magunetism and Magnetic Materials. (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 市瀬 和義: "Spin reorientations in(Nd_<1ーx>R_x)_2Co_<14>B componds" Journal of Magnetism and Magnetic Materials. (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 丸山 文男: "NMR study of Y_2(Co_<1ーx>Fe_x)_<14>B compounds" Journal of Magnetism and Magnetic Materials. (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 吉江 寛: "Nuclear Magnetic Resonace of Gd_2Co_7" Journal of Magnetism and Magnetic Materials. (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 安達 健五: "化合物磁性" 裳華房, 300 (1992)

    • Related Report
      1991 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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