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

Exploring of new semimetallic half-metals for three terminal devices

Research Project

Project/Area Number 25600070
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Applied materials
Research InstitutionTohoku University

Principal Investigator

MIZUKAMI Shigemi  東北大学, 原子分子材料科学高等研究機構, 教授 (00339269)

Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsハーフメタル / 磁気抵抗素子 / 半金属 / ホイスラー合金 / エピタキシャル / スピントロニクス
Outline of Final Research Achievements

Mn-Co-Ga alloys have been studied for exploring of new materials having both half-metallic and semi-metallic properties. Single phase Mn-Co-Ga epitaxial films with cubic structure have been successfully grown on MgO single crystalline substrate. The films showed large electrical resistivity and metallic temperature dependence of resistivity. The Hall coefficient for the films changed the sign depending on Co concentration while their absolute values were not large, as expected in semimetal. On the other hand, magnetic tunnel junctions with Mn-Co-Ga electrode showed the enhanced magnetoresistance at low temperature and the junction resistance larger by a factor of ten than that of the junction with Co non-doped Mn-Ga. These results indicated that Mn-Co-Ga had unique electronic states.

Report

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

    (24 results)

All 2015 2014 Other

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Acknowledgement Compliant: 3 results) Presentation (14 results) (of which Invited: 5 results) Remarks (3 results)

  • [Journal Article] TETRAGONAL HEUSLER-LIKE Mn-Ga ALLOYS BASED PERPENDICULAR MAGNETIC TUNNEL JUNCTIONS2015

    • Author(s)
      Q. MA, A. SUGIHARA, K. SUZUKI, X. ZHANG, T. MIYAZAKI, and S. MIZUKAMI
    • Journal Title

      Spin

      Volume: 4 Issue: 04 Pages: 1440024-1440024

    • DOI

      10.1142/s2010324714400244

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Direct measurement of the magnetic anisotropy field in Mn-Ga and Mn-Co-Ga Heusler films2015

    • Author(s)
      C. Fowley, S. Ouardi, T. Kubota, O. Yildirim, A. Neudert, K. Lenz, V. Sluka, J. Lindner, L. J. M., S. Mizukami, G. H. Fecher, C. Felser, and A. M. Deac
    • Journal Title

      J. Phys. D. Appl. Phys.

      Volume: 48 Issue: 16 Pages: 164006-164006

    • DOI

      10.1088/0022-3727/48/16/164006

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Magnetic dichroism study on Mn 1.8Co1.2Ga thin film using a combination of x-ray absorption and photoemission spectroscopy2015

    • Author(s)
      S. Ouardi, G. H. Fecher, T. Kubota, S. Mizukami, E. Ikenaga, T. Nakamura, and C. Felser
    • Journal Title

      J. Phys. D. Appl. Phys.

      Volume: 48 Issue: 16 Pages: 164007-164007

    • DOI

      10.1088/0022-3727/48/16/164007

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tunable ferromagnetic and antiferromagnetic interfacial exchange coupling in perpendicularly magnetized L10-MnGa/Co2FeAl Heusler bilayers2014

    • Author(s)
      Q. L. Ma, S. Mizukami, X. M. Zhang, and T. Miyazaki
    • Journal Title

      Journal Applied Physics

      Volume: 116 Issue: 23

    • DOI

      10.1063/1.4904348

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Tunnel magnetoresistance effect using perpendicularly magnetized tetragonal and cubic Mn-Co-Ga Heusler alloy electrode2014

    • Author(s)
      T. Kubota, S. Mizukami, Q.L. Ma, H. Naganuma, M. Oogane, Y. Ando, T. Miyazaki
    • Journal Title

      J. Appl. Phys

      Volume: 115 Issue: 17

    • DOI

      10.1063/1.4855016

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Static and dynamic magnetic properties of cubic Mn-Co-Ga Heusler films2014

    • Author(s)
      A.S. Demiray, T. Kubota, S. Iihama, *S. Mizukami, T. Miyazaki, H. Naganuma, M. Oogane, Y. Ando
    • Journal Title

      J. Appl. Phys

      Volume: 115 Issue: 17

    • DOI

      10.1063/1.4864250

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Abrupt Transition from Ferromagnetic to Antiferromagnetic of Interfacial Exchange in Perpendicularly Magnetized L10-MnGa/FeCo Tuned by Fermi Level Position2014

    • Author(s)
      Q.L. Ma, S. Mizukami, T. Kubota, X.M. Zhang, Y. Ando, T. Miyazaki
    • Journal Title

      Phys. Rev. Lett

      Volume: 112 Issue: 15

    • DOI

      10.1103/physrevlett.112.157202

    • Related Report
      2013 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Mn-based Tetragonal Heusler-like Alloys for Spintronics2014

    • Author(s)
      Shigemi Mizukami
    • Organizer
      Seminar
    • Place of Presentation
      University of York (英国)
    • Year and Date
      2014-12-11
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Functional tetragonal MnGa based composite for spintronics2014

    • Author(s)
      Q. L. Ma, S. Mizukami, and T. Miyazaki
    • Organizer
      Condensed Matter Physics Seminar in Johns-Hopkins University
    • Place of Presentation
      Baltimore (米国)
    • Year and Date
      2014-11-12
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] The Interfacial Exchange coupling in cubic Heusler/tetragonalHeusler Mn3Ga Bilayers2014

    • Author(s)
      R. Ranjbar, S. Mizukami, Q. Ma, A. Sugihara, K. Suzuki, X. Zhang, Y. Ando, and T. Miyazaki
    • Organizer
      59th Magnetism and Magnetic Material Conference (MMM)
    • Place of Presentation
      Hawaii (米国)
    • Year and Date
      2014-11-07
    • Related Report
      2014 Annual Research Report
  • [Presentation] Tailoring MnGa/FeCo interfacial coupling and their effect on spin dependent tunneling in perpendicular magnetic tunnel junctions2014

    • Author(s)
      Q. L. Ma, S. Mizukami, X. M. Zhang, Y. Ando, and T. Miyazaki
    • Organizer
      59th Magnetism and Magnetic Material Conference (MMM)
    • Place of Presentation
      Hawaii (米国)
    • Year and Date
      2014-11-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] Tetragonal Mn-Ga Heusler based hybrids for spintronics2014

    • Author(s)
      Q. L. Ma, S. Mizukami, and T. Miyazaki
    • Organizer
      3rd International Conference of Asian Union of Magnetics Societies (IcAUMS)
    • Place of Presentation
      Hainan (中国)
    • Year and Date
      2014-10-28
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Interfacial Exchange Coupling of Mn3Ga/Co2FeZ (Z=Al, Si) Heusler Bilayers2014

    • Author(s)
      R. Ranjbardizaj,S. Mizukami,Q. Ma,A. Sugihara,K. Suzuki,X. Zhang,Y. Ando,T. Miyazaki
    • Organizer
      第75回応用物理学会秋季学術講演会
    • Place of Presentation
      北海道大学 (札幌)
    • Year and Date
      2014-09-17
    • Related Report
      2014 Annual Research Report
  • [Presentation] Perpendicular Magnetic Tunnel Junctions with L10-MnGa/FM Electrodes2014

    • Author(s)
      Q. L. Ma, S. Mizukami, X. M. Zhang, A. Sugihara, Y. Ando, and T. Miyazaki
    • Organizer
      International Conference on Solid State Devices and Materials (SSDM)
    • Place of Presentation
      つくば
    • Year and Date
      2014-09-11
    • Related Report
      2014 Annual Research Report
  • [Presentation] Tetragonal Mn-based metallic ferrimagnets for spintronics applications,2014

    • Author(s)
      S. Mizukami, A. Sugihara, Q. L. Ma, X. M. Zhang, T. Miyazaki
    • Organizer
      e-MRS Spring Meeting
    • Place of Presentation
      Lille (フランス)
    • Year and Date
      2014-05-27
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Mn系垂直磁化薄膜-磁性、磁気緩和、およびトンネル接合-2014

    • Author(s)
      水上成美
    • Organizer
      第58回ナノマグネティクス専門研究会(日本磁気学会)
    • Place of Presentation
      中央大学 (東京)
    • Year and Date
      2014-05-23
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Magnetoresistance effect in L10-MnGa/MgO/CoFeB perpendicular magnetic tunnel junctions with Heusler alloy Co2FeAl as interlayer2014

    • Author(s)
      Q. L. Ma, S. Mizukami, X. M. Zhang, A. Sugihara, Y. Ando, and T. Miyazaki
    • Organizer
      50th International Conference of Magnetics (Intermag2014)
    • Place of Presentation
      Dresden (ドイツ)
    • Year and Date
      2014-05-04
    • Related Report
      2014 Annual Research Report
  • [Presentation] Magnetoresistance effect of perpendicularly magnetized tetragonal- or cubic- Mn-Co-Ga Heusler alloy electrode

    • Author(s)
      Takahide Kubota, Shigemi Mizukami, Hiroshi Naganuma, Mikihiko Oogane, Yasuo Ando, Terunobu Miyazaki
    • Organizer
      58th Annual Conference on Magnetism and Magnetic Materials
    • Place of Presentation
      Denver(米国)
    • Related Report
      2013 Research-status Report
  • [Presentation] Static and dynamic magnetic properties of cubic Mn3-xCoxGa Heusler thin films

    • Author(s)
      Ahmet S. Demiray, Takehide Kubota, Satoshi Iihama, Shigemi Mizukami, Terunubo Miyazaki, Hiroshi Naganuma, Mikihiko Oogane, Yasuo Ando
    • Organizer
      58th Annual Conference on Magnetism and Magnetic Materials
    • Place of Presentation
      Denver(米国)
    • Related Report
      2013 Research-status Report
  • [Presentation] Mn-Co-Ga電極を用いた垂直磁化トンネル接合における磁気抵抗効果

    • Author(s)
      窪田崇秀,水上成美,永沼博,大兼幹彦,安藤康夫,宮崎照宣
    • Organizer
      第74 回応用物理学会秋季学術講演会
    • Place of Presentation
      同志社大学(京都)
    • Related Report
      2013 Research-status Report
  • [Presentation] ホイスラー型Mn-Co-Ga エピタキシャル薄膜の作製とトンネル磁気抵抗効果

    • Author(s)
      窪田崇秀,Siham Ouardi,水上成美,G. H. Fecher,C. Felser,永沼博,大兼幹彦,安藤康夫,宮崎照宣
    • Organizer
      第37回日本磁気学会学術講演会
    • Place of Presentation
      北海道大学
    • Related Report
      2013 Research-status Report
  • [Remarks] 水上研究室

    • URL

      http://www.wpi-aimr.tohoku.ac.jp/mizukami_lab/

    • Related Report
      2014 Annual Research Report
  • [Remarks] スピントロニクス: 材料組成を調整してメモリー性能を向上させる

    • URL

      http://research.wpi-aimr.tohoku.ac.jp/jpn/research/836

    • Related Report
      2014 Annual Research Report
  • [Remarks] Mizukami Lab.

    • URL

      http://www.wpi-aimr.tohoku.ac.jp/mizukami_lab/

    • Related Report
      2013 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