• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Single crystal growth and anisotropic magnetic properties of ferrite materials aiming to develop iron-based oxide magnets for future generations

Research Project

Project/Area Number 25420710
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Inorganic materials/Physical properties
Research InstitutionKyoto University

Principal Investigator

Nakamura Hiroyuki  京都大学, 工学(系)研究科(研究院), 教授 (00202218)

Co-Investigator(Kenkyū-buntansha) TABATA Yoshikazu  京都大学, 大学院工学研究科, 准教授 (00343244)
WAKI Takeshi  京都大学, 大学院工学研究科, 助教 (50463906)
Project Period (FY) 2013-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywordsフェライト磁石 / マグネトプランバイト型 / 単結晶 / フラックス法 / メスバウア分光 / 核磁気共鳴 / 磁気異方性 / メタ磁性 / 永久磁石 / 国際研究者交流
Outline of Final Research Achievements

Structural and magnetic properties of magnetoplumbite-type ferrites, base materials of permanent magnets, were characterized with use of single crystals grown by flux methods. For Ca-La ferrite as the base material of the Ca-La-Co high-performance magnet, phase stability study revealed that the amount of Fe is always less the M-type regular value, suggesting a certain anomaly in the structure. This is supported by 57Fe Mossbauer spectroscopy. A jump in the hard-axis magnetization was found at low temperature. 57Fe NMR study for the single crystal under external field revealed that this phenomenon is related the the switching of the easy axis of the Fe moment at the 12k sit. Site-dependent Co valence and spin state in the La-Co co-substituted Sr ferrite were also discussed on the basis of 59Co NMR.

Report

(4 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (5 results)

All 2016 2015 2014 Other

All Int'l Joint Research (1 results) Presentation (4 results)

  • [Int'l Joint Research] IPCMS(フランス)

    • Related Report
      2015 Annual Research Report
  • [Presentation] M型フェライトのメタ磁性:NMR による研究2016

    • Author(s)
      高尾健太,宇治克俊,和氣剛,田畑吉計,中村裕之
    • Organizer
      日本物理学会第71回年次大会
    • Place of Presentation
      東北学院大
    • Year and Date
      2016-03-19
    • Related Report
      2015 Annual Research Report
  • [Presentation] 57Fe-NMRによるM型Caフェライトの研究2015

    • Author(s)
      高尾健太,宇治克俊,和氣剛,田畑吉計,中村裕之
    • Organizer
      日本磁気学会第39回学術講演会
    • Place of Presentation
      名古屋大
    • Year and Date
      2015-09-08
    • Related Report
      2015 Annual Research Report
  • [Presentation] La置換M型Caフェライトの単結晶合成と物性2015

    • Author(s)
      宇治克俊,和氣剛,田畑吉計,中村裕之
    • Organizer
      日本磁気学会第39回学術講演会
    • Place of Presentation
      名古屋大
    • Year and Date
      2015-09-08
    • Related Report
      2015 Annual Research Report
  • [Presentation] Co置換M型フェライトの59Co-NMR2014

    • Author(s)
      中村裕之,下田愛子,和氣剛,田畑吉計,C. Meny
    • Organizer
      粉体粉末冶金協会
    • Place of Presentation
      大阪大学コンベンションセンター
    • Year and Date
      2014-10-29 – 2014-10-31
    • Related Report
      2014 Research-status Report

URL: 

Published: 2014-07-25   Modified: 2019-07-29  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi