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2012 Fiscal Year Final Research Report

Creation of nano-magnet model thin films with HRE ideal interface for reducing rare-metal

Research Project

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Project/Area Number 22560688
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionYamagata University

Principal Investigator

KOIKE Kunihiro  山形大学, 大学院・理工学研究科, 准教授 (40241723)

Project Period (FY) 2010 – 2012
Keywordsモデル界面 / 超高真空成膜 / 微細化効果 / 被覆効果 / 永久磁石 / レアメタル / ジスプロシウム / ネオジム磁石
Research Abstract

Nd-Fe-B sintered magnets have a potential for wide application such as a high performance motor for hybrid electric vehicle (HEV) and direct drive widow turbine. Recently, a new technique to enhance the coercivity H_c by using lesser amount of heavy rare earth element (HRE) has been developed, which is called a grain boundary diffusion process “GBDP". On the other hand, it is believed that the Nd-rich phase plays an important role in the coercivity enhancement in Nd-Fe-B magnets. In the case of GBDP magnets with Dy, however, it is still not clear whether only the Dy-rich shell or both Dy-shell and the Nd-rich phase are indispensible for the high H_c. Therefore, we fabricated a model interface system, which consists of the Nd_2Fe_<14>B layer with Dy overlayer and Dy/Nd double over-layer in order to study the relationship between microstructure near the interface and the coercivity.

  • Research Products

    (36 results)

All 2013 2012 2011 2010 Other

All Journal Article (12 results) (of which Peer Reviewed: 4 results) Presentation (23 results) Remarks (1 results)

  • [Journal Article] Coercivity enhancement phenomena observed in various series of Nd_2Fe_<14>B thin films2012

    • Author(s)
      K. Koike, T. Kusano, D. Ogawa, T. Miyazaki, Y. Ando, and H. Kato
    • Journal Title

      Proc on the 22th International Workshop on Rare-earth Permanent Magnets and their Applications, Nagasaki, Japan

      Pages: 460-463

  • [Journal Article] Effect of Rare-Earth Overlayers on the Coercivity in Nd-Fe-B Films2012

    • Author(s)
      J. Umezawa, Y. Sakai, K. Koike, D. Ogawa, Y. Mizuno, T. Miyazaki, Y. Ando, and H. Kato
    • Journal Title

      Proc on the 22th International Workshop on Rare-earth Permanent Magnets and their Applications, Nagasaki, Japan

      Pages: 453-455

  • [Journal Article] Evaluation of Exchange Coupling in Nd_2Fe_<14>B/α-Fe Interfaces2012

    • Author(s)
      D. Ogawa, K. Koike, S. Mizukami, T. Miyazaki, M. Oogane, Y. Ando, and H. Kato
    • Journal Title

      Proc on the 22th International Workshop on Rare-earth Permanent Magnets and their Applications, Nagasaki, Japan

      Pages: 161-164

  • [Journal Article] Evaluation of Exchange Coupling in α-Fe(100)/Nd_2Fe_<14>B(001) interface2012

    • Author(s)
      D. Ogawa, K. Koike, S. Mizukami, M. Oogane, Y. Ando, T. Miyazaki and H. Kato
    • Journal Title

      J. Mag. Soc. Jpn.

      Volume: 36 Pages: 5-12

    • Peer Reviewed
  • [Journal Article] Interface State and Coercivity in Nd-Fe-B Magnets2012

    • Author(s)
      H. Kato, D. Ogawa, and K. Koike
    • Journal Title

      Proc on the 22th International Workshop on Rare-earth Permanent Magnets and their Applications, Nagasaki, Japan

      Pages: 153-154

  • [Journal Article] Effect of rare-earth overlayer on the coercivity in sputter-deposited Nd-Fe-B films2010

    • Author(s)
      K. Koike, S. Igarashi, K. Yamaguchi, T. Kusano, T. Miyazaki, D.Ogawa, T. Akiya, Y. Adachi, and H. Kato
    • Journal Title

      J. Phys.: Conf. Series

      Volume: 200 Pages: 082015(1)-082015(4)

    • Peer Reviewed
  • [Journal Article] Modification of the interface nanostructure and coercivity in Nd-Fe-B magnets, Proc2010

    • Author(s)
      H. Kato, T. Akiya, K. Koike, D. Ogawa
    • Journal Title

      on the 21th International Workshop on Rare-earth Permanent Magnets and their Applications, Bled, Slovenia

      Pages: 36-39

  • [Journal Article] Ferromagnetic resonance investigation of exchange coupling in Nd_2Fe_<14>B/α-Fe interfaces2010

    • Author(s)
      D. Ogawa, K. Koike, T. Miyazaki, S. Mizukami, T. Akiya, M. Oogane, Y. Ando, H. Kato
    • Journal Title

      Proc on the 21th International Workshop on Rare-earth Permanent Magnets and their Applications, Bled, Slovenia

      Pages: 40-42

  • [Journal Article] Giant coercivity enhancement by Nd sputter coating in Nd_2Fe_<14>B thin films2010

    • Author(s)
      K. Koike, T. Kusano, D. Ogawa, T. Miyazaki, T. Akiya, Y. Adachi, and H. Kato
    • Journal Title

      Proc on the 21th International Workshop on Rare-earth Permanent Magnets and their Applications, Bled, Slovenia

      Pages: 106-108

  • [Journal Article] Interface state and Coercivity in Nd-Fe-B/Dy Films

    • Author(s)
      J. Umezawa, Y. Sakai, K. Koike, D. Ogawa, Y. Mizuno, T. Miyazaki, Y. Ando, and H. Kato
    • Journal Title

      J. Korean Phys. Soc.

      Volume: (in press)

    • DOI

      10.3938/jkps.63.616

    • Peer Reviewed
  • [Journal Article] Evaluation of interlayer exchange coupling in α-Fe(100)/Nd_2Fe_<14>B(001) Films

    • Author(s)
      D. Ogawa, K. Koike, S. Mizukami, T. Miyazaki, M. Oogane, Y. Ando and H. Kato
    • Journal Title

      J. Korean Phys. Soc.

      Volume: (in press)

    • Peer Reviewed
  • [Journal Article] Nd_2Fe_<14>B/α-Fe界面における交換結合の評価

    • Author(s)
      小川大介, 小池邦博, 水上成美, 大兼幹彦, 安藤康夫, 宮崎孝道, 加藤宏朗
    • Journal Title

      信学技報(IEICE Technical Report)

      Volume: 31 Pages: 112, 80

  • [Presentation] Nd/Dy層で被覆されたNd-Fe-B薄膜の磁気特性2013

    • Author(s)
      小池邦博, 梅澤 仁,水野善幸,小川大介,宮崎孝道,安藤康夫,加藤宏朗
    • Organizer
      2013年日本金属学会春期(第152回)講演大会
    • Place of Presentation
      東京理科大学神楽坂キャンパス, 新宿区,東京都
    • Year and Date
      20130327-0329
  • [Presentation] Combinatorial approach to the optimization of magnetic properties in Nd-Fe-B thin films2012

    • Author(s)
      D. Ogawa, K. Koike, and H. Kato
    • Organizer
      2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS2012)
    • Place of Presentation
      Nara Prefectural Public Hall, Nara, Japan
    • Year and Date
      20121002-1005
  • [Presentation] Effect of Annealing on Coercivity of Nd-Fe-B/Nd Thick Films2012

    • Author(s)
      K. Koike, J. Umezawa, H. Shiroiwa, D. Ogawa, and H. Kato
    • Organizer
      2nd International Conference of the Asian Union of Magnetics Societies (ICAUMS2012)
    • Place of Presentation
      Nara Prefectural Public Hall, Nara, Japan
    • Year and Date
      20121002-1005
  • [Presentation] EVALUATION OF EXCHANGE COUPLING IN Nd_2Fe_<14>B/α-Fe INTERFACES2012

    • Author(s)
      D. Ogawa, K. Koike, S. Mizukami, T. Miyazaki, M. Oogane, Y. Ando, and H. Kato
    • Organizer
      21st Workshop on Rare-Earth Permanent Magnets and their Applications (REPM'12)
    • Place of Presentation
      Nagasaki Brick Hall, Nagasaki, Japan
    • Year and Date
      20120902-0905
  • [Presentation] EFFECT OF RARE-EARTH OVERLAYERS ON THE COERCIVITY IN Nd-Fe-B FILMS2012

    • Author(s)
      J. Umezawa, Y. Sakai, K. Koike, D. Ogawa, Y. Mizuno, T. Miyazaki, Y. Ando, and H. Kato
    • Organizer
      21st Workshop on Rare-Earth Permanent Magnets and their Applications (REPM'12)
    • Place of Presentation
      Nagasaki Brick Hall, Nagasaki, Japan
    • Year and Date
      20120902-0905
  • [Presentation] COERCIVITY ENHANCEMENT PHENOMENA OBSERVED IN VARIOUS SERIES OF Nd_2Fe_<14>B/Nd FILMS2012

    • Author(s)
      K. Koike, T. Kusano, D. Ogawa, Y. Mizuno, T. Miyazaki, Y. Ando and H. Kato
    • Organizer
      21st Workshop on Rare-Earth Permanent Magnets and their Applications (REPM'12)
    • Place of Presentation
      Nagasaki Brick Hall, Nagasaki, Japan
    • Year and Date
      20120902-0905
  • [Presentation] Evaluation of interlayer exchange coupling in α-Fe(100)/Nd_2Fe_<14>B(001) Films2012

    • Author(s)
      D. Ogawa, K. Koike, S. Mizukami, T. Miyazaki, M. Oogane, Y. Ando and H. Kato
    • Organizer
      The19th International Conference on Magnetism (ICM2012)
    • Place of Presentation
      Bexco, Busan, Korea
    • Year and Date
      20120708-13
  • [Presentation] Interface state and Coercivity in Nd-Fe-B/Dy Films2012

    • Author(s)
      J. Umezawa, Y. Sakai, K. Koike, D. Ogawa, Y. Mizuno, T. Miyazaki, Y. Ando, and H. Kato
    • Organizer
      The19th International Conference on Magnetism (ICM2012)
    • Place of Presentation
      Bexco, Busan, Korea
    • Year and Date
      20120708-13
  • [Presentation] Effects of Grain Size and Interface State on the Coercivity in Nd-Fe-B/Nd Thin Films2012

    • Author(s)
      K. Koike, T. Kusano, D. Ogawa, Y. Mizuno, T. Miyazaki, Y. Ando and H. Kato
    • Organizer
      The19th International Conference on Magnetism (ICM2012)
    • Place of Presentation
      Bexco, Busan, Korea
    • Year and Date
      20120708-13
  • [Presentation] Nd-Fe-B/Dyスパッタ薄膜の磁気特性, 1pA042011

    • Author(s)
      梅澤 仁, 小池邦博, 小川大介, 水野善幸, 加藤宏朗
    • Organizer
      第66回応用物理学会東北支部学術講演会
    • Place of Presentation
      いわて県民情報交流センター, 岩手市,岩手県
    • Year and Date
      20111201-03
  • [Presentation] Nd-Fe-B 微粒子膜の保磁力に与えるNd被覆の影響2011

    • Author(s)
      小池邦博, 草野貴尚, 梅澤 仁, 小川大介, 加藤宏朗
    • Organizer
      日本金属学会 2011年秋期講演 (第149回) 大会
    • Place of Presentation
      沖縄コンベンションセンターおよびカルチャーリゾートフェストーネ,宜野湾市真志喜,沖縄県
    • Year and Date
      20111107-1109
  • [Presentation] Nd-Fe-B/Dy薄膜の界面状態と磁気特性, 27aC- 22011

    • Author(s)
      梅澤 仁, 小池邦博, 小川大介, 水野善幸, 稲葉信幸, 加藤宏朗
    • Organizer
      2011年度・日本磁気学会第35回学術講演会
    • Place of Presentation
      新潟コンベンションセンター,新潟市,新潟県
    • Year and Date
      20110927-30
  • [Presentation] Evaluation of Exchange Coupling in α-Fe/Nd_2Fe_<14>B Interfaces2011

    • Author(s)
      D. Ogawa, K. Koike, T. Miyazaki, S. Mizukami, M. Oogane, Y. Ando, H. Kato
    • Organizer
      European Congress on Advanced Materials and Processes
    • Place of Presentation
      Le Corum Conference Centre, Montpellier, France
    • Year and Date
      20110912-15
  • [Presentation] Effect of grain size and intergranular state on the coercivity in Nd-coated Nd_2Fe_<14>B films2011

    • Author(s)
      K. Koike, K. Takanao, O. Daisuke, U. Jin, M. Takamichi, M. Yoshiyuki, K. Hiroaki
    • Organizer
      European Congress on Advanced Materials and Processes
    • Place of Presentation
      Le Corum Conference Centre, Montpellier, France
    • Year and Date
      20110912-15
  • [Presentation] Effects of Nd-Fe-B grain size and Nd coating on the coercivity in Nd_2Fe_<14>B thin films2011

    • Author(s)
      K. Koike, T. Kusano, D. Ogawa, Y. Adachi, H. Kato
    • Organizer
      IEEE International Magnetics Conference
    • Place of Presentation
      Taipei, Taiwan
    • Year and Date
      20110425-29
  • [Presentation] Coercivity enhancement in Nd-Fe-B/Nd thick films2010

    • Author(s)
      K. Koike, S. Igarashi, T. Miyazaki, D. Ogawa, H. Kimura, and H. Kato
    • Organizer
      International Conference of Asian Union of Magnetics Societies ICAUMS2010
    • Place of Presentation
      Lotte Hotel Jeju, Jeju Island, Korea
    • Year and Date
      20101205-08
  • [Presentation] Interface Structure and Coercivity in Nd-Fe-B/Dy Films2010

    • Author(s)
      K. Koike, Y. Sakai, T. Kusano, N. Inaba, and H. Kato
    • Organizer
      International Conference of Asian Union of Magnetics Societies ICAUMS2010
    • Place of Presentation
      Lotte Hotel Jeju, Jeju Island, Korea
    • Year and Date
      20101205-08
  • [Presentation] Nd-Fe-B/Dy薄膜の界面状態と保磁力2010

    • Author(s)
      梅澤 仁,坂井美樹,草野貴尚,小池邦博,稲葉信幸,加藤宏朗
    • Organizer
      第65回応用物理東北支部学術講演会
    • Place of Presentation
      東北大学工学部青葉記念会館,仙台市,宮城県
    • Year and Date
      20101125-26
  • [Presentation] Ferromagnetic Resonance Investigation of Exchange Coupling in Nd_2Fe_<14>B /α-Fe Interfaces2010

    • Author(s)
      D. Ogawa, K. Koike, T. Miyazaki, S. Mizukami, T. Akiya, M. Oogane, Y. Ando and H. Kato
    • Organizer
      21st Workshop on Rare-Earth Permanent Magnets and their Applications (REPM'10)
    • Place of Presentation
      Bled, Slovenia
    • Year and Date
      20100829-0902
  • [Presentation] Giant Coercivity Enhancement by Nd Sputter Coating in Nd_2Fe_14B Thin Films2010

    • Author(s)
      K. Koike, T. Kusano, D. Ogawa, T. Miyazaki, T. Akiya, Y. Adachi and H. Kato
    • Organizer
      21st Workshop on Rare-Earth Permanent Magnets and their Applications (REPM'10)
    • Place of Presentation
      Bled, Slovenia
    • Year and Date
      20100829-0902
  • [Presentation] Ferromagnetic-Resonance Study of Exchange Coupling inα-Fe/Nd_2Fe_<14>B Interfaces PC-152010

    • Author(s)
      D. Ogawa, K. Koike, T. Miyazaki, S. Mizukami, M. Oogane, Y. Ando and H. Kato
    • Organizer
      The 2nd International Symposium on Advanced Magnetic Materials and Applications (ISAMMA2010)
    • Place of Presentation
      Sendai international center, Sendai, Miyagi
    • Year and Date
      20100712-16
  • [Presentation] Effect of Substrate Temperature during Deposition of Nd overlayer on the Coercivity in Nd-Fe-B Thick Films RC-082010

    • Author(s)
      S. Igarashi, K. Koike, T. Miyazaki, Y. Mizuno, D. Ogawa, T. Akiya, H. Kimura, Y. Adachi and H. Kato
    • Organizer
      The 2nd International Symposium on Advanced Magnetic Materials and Applications (ISAMMA2010)
    • Place of Presentation
      Sendai international center, Sendai, Miyagi
    • Year and Date
      20100712-16
  • [Presentation] Enhanced coercivity in Al_2O_3(a-plane)/Mo /Nd-Fe-B/Nd/Mo thin films RC-092010

    • Author(s)
      K. Koike, D. Ogawa, T. Kusano, T. Miyazaki, T. Akiya, Y. Adachi and H. Kato
    • Organizer
      The 2nd International Symposium on Advanced Magnetic Materials and Applications (ISAMMA2010)
    • Place of Presentation
      Sendai international center, Sendai, Miyagi
    • Year and Date
      20100712-16
  • [Remarks]

    • URL

      http://i-physics.yz.yamagata-u.ac.jp/

URL: 

Published: 2014-08-29   Modified: 2023-03-16  

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