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Magnetic Anisotropy and Orbilal Magnetic Moment in Ordered FePt Nanoparticles

Research Project

Project/Area Number 17310061
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Nanostructural science
Research InstitutionHiroshima University

Principal Investigator

MARUYAMA Hiroshi  Hiroshima University, Graduate School of Science, Professor (20181836)

Co-Investigator(Kenkyū-buntansha) NAKAJIMA Nobuo  Hiroshima University, Graduate School of Science, Associate Professor (90302017)
ISHIMATSU Naoki  Hiroshima University, Graduate School of Science, Assistant Professor (70343291)
Project Period (FY) 2005 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥15,260,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥660,000)
Fiscal Year 2007: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2006: ¥6,400,000 (Direct Cost: ¥6,400,000)
Fiscal Year 2005: ¥6,000,000 (Direct Cost: ¥6,000,000)
KeywordsFePt nano-particles / CoPt thin films / X-ray magnetic circular dichroism / Orbital magnetic moment / Ordered alloy / Angle-resolved photoemission spectroscopy / Electronic structure / 規則相FePt合金 / 磁気状態 / 規則相 / 光電子分光 / XMCD / 規則-不規則相
Research Abstract

In this study, we aimed to clarify the correlation between magnetic anisotropy and orbital moment in ordered alloys consisting of transition metal(TM; Fe or Co) and noble metal (NM; Pt or Au). Improvement in X-ray spectroscopic experiment and systematic measurement have provided the following outcomes with a comparison between nanometer-sized materials and the bulk sample
(1) Experimental achievements:
X-ray absorption spectroscopy has been extended to the range of high pressure up to 50 GPa. We have also succeeded in angle-resolved photoemission spectroscopy for the FePt_3 ordered alloy. These techniques are advantageous to studying the nanometer-sized materials in terms of electronic structure by a comparative analysis with the bulk sample. From X-ray magnetic circular dichroism (XMCD)at the Pt L_<2,3>-edges in CoPt thin films, the orbital component of Pt 5d states was estimated, consequently it has been revealed that the orbital moment is decreased with reducing the film thickness. To … More examine the anisotropy in the orbital component, the difference in dichroic intensity between out-of plane and in-plane geometries was also recorded. These techniques are available for understanding size effect; in particular, it is valuable to link in-situ measurement with sample preparation.
(2) Scientific outcomes:
For the role of NM in the ordered alloys, hybridization between NM 5d and TM 3d orbitals is important for forming the ordered structure, in consequence the spin-orbit interaction of NM 5d states is notable for the magnetic properties. For the perpendicular magnetization thin films, however, the enhancement in magnetic anisotropy constant is not directly associated with the magnitude of orbital moment, but may be ascribed to metallographic and crystallographic structures in the thin films. From the X-ray absorption experiments of Au_4Mn ordered alloy under high pressure, some discussion for Gruneisen parameter can be developed, and the magneto-volume effect should be examined on the basis of spin-fluctuation. Less

Report

(4 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (40 results)

All 2008 2007 2006 2005

All Journal Article (7 results) (of which Peer Reviewed: 4 results) Presentation (33 results)

  • [Journal Article] X線磁気円二色性による高圧物性の研究2007

    • Author(s)
      石松直樹, 圓山裕, 河村直己
    • Journal Title

      日本結晶学会誌 49

      Pages: 279-285

    • NAID

      10019794326

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Valence-Band Photoemission Spectroscopy of a Single-Crystal FePt_32007

    • Author(s)
      N. Tobita, 他8名
    • Journal Title

      J. Mag. Mag. Mater. 310

      Pages: 1642-644

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] "Material Science under High Pressure using X-ray Magnetic Circular Dichroism"(in Japanese)2007

    • Author(s)
      N., Ishimatsu, H., Maruyama, N., Kawamura
    • Journal Title

      J. Crystallographic Society of Japan 49

      Pages: 279-285

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Valence-Band Photoemission Spectroscopy of a Single-Crystal FePt_32007

    • Author(s)
      N., Tobita, K., Emi, N., Nakajima, H., Maruyama, Y., Miura, M., Higashiguchi, K., Shimada, H., Namatame, M., Taniguchi
    • Journal Title

      J. Mag. Mag. Mater 310

      Pages: 1642-644

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Journal Article] Valence-Band Photoemission Spectroscopy of a Single-Crystal FePt_32007

    • Author(s)
      N.Tobita, 他8名
    • Journal Title

      J. Mag. Mag. Mater. 310

      Pages: 1642-644

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Depth Profile of Spin and Orbital Magnetic Moments in Sub-nm Pt Film on Co2005

    • Author(s)
      M. Suzuki, 他9名
    • Journal Title

      Physical Review B 72

      Pages: 54430-8

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
    • Peer Reviewed
  • [Journal Article] Depth Profile of Spin and Orbital Magnetic Moments in Sub-nm Pt Film on Co2005

    • Author(s)
      M., Suzuki, H., Muraoka, Y., Inaba, H., Miyagawa, N., Kawamura, T., Shimatsu, H., Maruyama, N., Ishimatsu, Y., Isohama, Y., Sonobe
    • Journal Title

      Phys. Rev 72

      Pages: 54430-8

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] XMCD Study of Co and Pt Orbital Contribution to Perpendicular Magnetization in CoPt Thin-Films2008

    • Author(s)
      N. Ishimatsu, 他11名
    • Organizer
      第12回広島放射光国際シンポジウム
    • Place of Presentation
      広島大学,東広島市
    • Year and Date
      2008-03-13
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Angle-resolved photoemission study of Pt(111)2008

    • Author(s)
      N. Tobita, 他11名
    • Organizer
      第12回広島放射光国際シンポジウム
    • Place of Presentation
      広島大学,東広島市
    • Year and Date
      2008-03-13
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] XMCD Study of Co and Pt Orbital Contribution to Perpendicular Magnetization in CoPt Thin-Films2008

    • Author(s)
      N., Ishimatsu, R., Ogasawara, T., Sone, Y., Tsutsui, H., Maruyama, N., Nakajima, M., Sawada, H., Namatame, Y., Okazaki, H., Sato, T., Shimatsu, H., Muraoka
    • Organizer
      The 12-th Hiroshima Inter. Sym. on Synchrotron Radiation
    • Place of Presentation
      Hiroshima University, Higashi-Hiroshima
    • Year and Date
      2008-03-13
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Angle-resolved photoemissicnstudy of Pt(111)2008

    • Author(s)
      N., Tobita, S., Fukuda, N., Nakajima, N., Ishimatsu, H., Maruyama, H., Hayashi, K., Tanaka, J., Jiang, M., Higashiguchi, K., Shimada, H., Namatame, M., Taniguchi
    • Organizer
      The 12-th Hiroshima Inter. Sym. on Synchrotron Radiation
    • Place of Presentation
      Hiroshima University, Higashi-Hiroshima
    • Year and Date
      2008-03-13
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Angle-resolved photoemissin study of Pt(111)2008

    • Author(s)
      N.Tobita, 他11名
    • Organizer
      第12回広島放射光国際シンポジウム
    • Place of Presentation
      広島大学,東広島市
    • Year and Date
      2008-03-13
    • Related Report
      2007 Annual Research Report
  • [Presentation] XMCD Study of Pt Orbital Contribution to Perpendicular Magnetization in CoPt Thin-Films2007

    • Author(s)
      N. Ishimatsu, 他9名
    • Organizer
      第8回垂直磁気記録国際会議-PMRC2007-
    • Place of Presentation
      東京国際フォーラム,東京
    • Year and Date
      2007-10-15
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] XMCD Study of Pt Orbital Contribution to Perpendicular Magnetization in CoPt Thin-Films2007

    • Author(s)
      N., Ishimatsu, Y., Tsutsui, H., Maruyama, N., Kawamura, M., Suzuki, H., Osawa, Y., Okazaki, H., Sato, T., Shimatsu, H., Muraoka
    • Organizer
      The 8-th Perpendicular Magnetic Recording Conference - PMRC2007
    • Place of Presentation
      Tokyo International Forum, Tokyo
    • Year and Date
      2007-10-15
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] XMCD Study of Pt Orbital Contribution to Perpendicular Magnetization in Copt Thin-Films2007

    • Author(s)
      N.Ishimatsu, 他9名
    • Organizer
      第8回垂直磁気記録国際会議-PMRC2007-
    • Place of Presentation
      東京国際フォーラム,東京
    • Year and Date
      2007-10-15
    • Related Report
      2007 Annual Research Report
  • [Presentation] 高圧下Au L_<2,3>端XMCDによるAu_4MnのAu 5d磁気状態の研究2007

    • Author(s)
      金田大輔, 石松直樹, 圓山裕, 河村直己
    • Organizer
      日本物理学会第62回年次大会
    • Place of Presentation
      北海道大学,札幌市
    • Year and Date
      2007-09-21
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Angle-resolved photoemission study of FePt_3 ordered alloy2007

    • Author(s)
      N. Tobita, 他10名
    • Organizer
      第15回真空紫外線物理国際会議-VUV2007-
    • Place of Presentation
      ドイツ,ベルリン市
    • Year and Date
      2007-08-02
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Angle-resolved photoemission study of FePt_3 ordered alloy2007

    • Author(s)
      N., Tobita, S., Fukuda, N., Nakajima, N., Ishimatsu, H., Maruyama, K., Tanaka, Y., Miura, M., Higashiguchi, K., Shimada, H., Namatame, M., Taniguchi
    • Organizer
      The 15-th International Conference on Vacuum Ultraviolet Radiation Physics, VUV-15
    • Place of Presentation
      Berlin, Germany
    • Year and Date
      2007-08-02
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] TM-Pt合金(TM=Cr, Fe)の価電子帯共鳴光電子分光2007

    • Author(s)
      飛田尚寿, 他9名
    • Organizer
      日本物理学会2007年春季大会
    • Place of Presentation
      鹿児島大学,鹿児島市
    • Year and Date
      2007-03-20
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Valence-band photoemission study of TM-Pt(TM=Cr, Fe)alloys2007

    • Author(s)
      S. Fnkuda, 他10名
    • Organizer
      第11回広島放射光国際シンポジウム
    • Place of Presentation
      広島大学,東広島市
    • Year and Date
      2007-03-08
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Angle-resolved photoemission study of FePt_3 ordered alloy2007

    • Author(s)
      N. Tobita, 他10名
    • Organizer
      第11回広島放射光国際シンポジウム
    • Place of Presentation
      広島大学,東広島市
    • Year and Date
      2007-03-08
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Film thickness dependence of the Co L_<2,3>-edges XMCD in Co_<80>Pt_<20> films with perpendicular magnetic anisotropy2007

    • Author(s)
      N. Ishimatsu, 他6名
    • Organizer
      第11回広島放射光国際シンポジウム
    • Place of Presentation
      広島大学,東広島市
    • Year and Date
      2007-03-08
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Valence-band photoemission study of TM-Pt(TM=Cr, Fe)alloys2007

    • Author(s)
      S., Fukuda, N., Tobita, N., Nakajima, N., Ishimatsu, H., Maruyama, K., Tanaka, Y., Miura, M., Higashiguchi, K., Shimada, H., Namatame, M., Taniguchi
    • Organizer
      The 11-th Hiroshima Inter. Sym. on Synchrotron Radiation
    • Place of Presentation
      Hiroshima University, Higashi-Hiroshima
    • Year and Date
      2007-03-08
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Angle-resolved photoemission study of FePt_3 ordered alloy2007

    • Author(s)
      N., Tobita, S., Fukuda, N., Nakajima, N., Ishimatsu, H., Maruyama, K., Tanaka, Y., Miura, M., Higashiguchi, K., Shimada, H., Namatame, M., Taniguchi
    • Organizer
      The 11-th Hiroshima Inter. Sym. on Synchrotron Radiation
    • Place of Presentation
      Hiroshima University, Higashi-Hiroshima
    • Year and Date
      2007-03-08
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Film thickness dependence of the Co Las-edges XMCD in Co_<80>Pt_<20> films with perpendicular magnetic anisotropy2007

    • Author(s)
      N., Ishimatsu, T., Sone, Y., Tsutsui, H., Maruyama, M., Sawada, H., Namatame, T., Shimatsu
    • Organizer
      The 11-th Hiroshima Inter. Sym. on Synchrotron Radiation
    • Place of Presentation
      Hiroshima University, Higashi-Hiroshima
    • Year and Date
      2007-03-08
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] XMCD study under extreme conditions-Magnetic phase transition in itinerant electron system-(招待講演)2007

    • Author(s)
      H. Maruyama
    • Organizer
      磁性体のX線分光国際シンポジウム-XRMS2007-
    • Place of Presentation
      ESRF,グルノーブル市,フランス
    • Year and Date
      2007-02-06
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] "XMCD study under extreme conditions - Magnetic phase transition in itinerant electron system-"(invited)2007

    • Author(s)
      H., Maruyama
    • Organizer
      Int. "X-ray Spectroscopy of Magnetic Solids-XRMS2007-
    • Place of Presentation
      Grenoble, France
    • Year and Date
      2007-02-06
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 遷移金属合金FePt_3の価電子帯光電子分光2007

    • Author(s)
      飛田尚寿, 他9名
    • Organizer
      第20回日本放射光学会年会・放射光科学合同シンポジウム
    • Place of Presentation
      広島国際会議場,広島市
    • Year and Date
      2007-01-14
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Pt L_<2,3>-edgeのXMCDでみたCoCrPt垂直磁化膜のPtの電子状態2007

    • Author(s)
      筒井靖之, 他8名
    • Organizer
      第20回日本放射光学会年会・放射光科学合同シンポジウム
    • Place of Presentation
      広島国際会議場,広島市
    • Year and Date
      2007-01-14
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Valence-Band Photoemission Spectroscopy of a Single-Crystal FePt_32006

    • Author(s)
      N. Tobita, 他8名
    • Organizer
      国際磁気会議-ICM2006-
    • Place of Presentation
      京都国際会議場,京都市
    • Year and Date
      2006-08-21
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Valence-Band Photoemission Spectroscopy of a Single-Crystal FePt_32006

    • Author(s)
      N., Tobita, K., Emi, N., Nakajima, H., Maruyama, Y., Miura, M., Higashiguchi, K., Shimada, H., Namatame, M., Taniguchi
    • Organizer
      Inter. Conf. on Magnetism, ICM-2006
    • Place of Presentation
      Kyoto Inter. Conf. Center, Kyoto
    • Year and Date
      2006-08-21
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Pt 5d Magnetic States in Ordered Fe-Pt Alloy under High Pressure Probed by Pt L_<2,3>-edges XMCD2006

    • Author(s)
      N. Ishimatsu, 他4名
    • Organizer
      第5回放射光物質科学国際会議-SRMS-5-
    • Place of Presentation
      シカゴ市,米国
    • Year and Date
      2006-07-31
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Pt 5d Magnetic States in Ordered Fe-Pt Alloy under High Pressure Probed by Pt L_<2,3>-edges XMCD2006

    • Author(s)
      N., Ishimatsu, M., Yamada, H., Maruyama, N., Kawamura, M., Suzuki
    • Organizer
      The 5th Int. Conf. on Synchrotron Radiation in Materials Science, SRMS-5
    • Place of Presentation
      Chicago, USA
    • Year and Date
      2006-07-31
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Valence-band photoemission spectroscopy of a single crystal FePt_32006

    • Author(s)
      N. Tobita, 他8名
    • Organizer
      第10回広島放射光国際シンポジウム
    • Place of Presentation
      広島大学,東広島市
    • Year and Date
      2006-03-16
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Valence-band photoemission spectroscopy of a single crystal FePt_32006

    • Author(s)
      N., Tobita, K., Emi, N., Nakajima, H., Maruyama, Y., Miura, M., Higashiguchi, K., Shimada, H., Namatame, M., Taniguchi
    • Organizer
      The 10-th Hiroshima Inter. Sym. on Synchrotron Radiation
    • Place of Presentation
      Hiroshima University, Higashi-Hiroshima
    • Year and Date
      2006-03-16
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Pt L_<2,3>-edge XMCDで見たFePt粒子の磁性の研究2006

    • Author(s)
      山田真裕, 他7名
    • Organizer
      第19回日本放射光学会年会・放射光科学合同シンポジウム
    • Place of Presentation
      名古屋大学,名古屋市
    • Year and Date
      2006-01-09
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 遷移金属合金FePt3単結晶の価電子帯光電子分光II2006

    • Author(s)
      飛田尚寿, 他9名
    • Organizer
      日本物理学会 秋季大会
    • Place of Presentation
      千葉大学,千葉市
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] XMCDによるFePtナノ粒子およびバルク合金におけるPt磁性の研究2006

    • Author(s)
      石松直樹, 他7名
    • Organizer
      日本物理学会第61回年次大会
    • Place of Presentation
      愛媛大・松山大,松山市
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] FePt_3規則合金単結晶の価電子帯光電子分光2006

    • Author(s)
      飛田尚寿, 他6名
    • Organizer
      日本物理学会第61回年次大会
    • Place of Presentation
      愛媛大・松山大,松山市
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Pt-L_<2,3>吸収端XMCD測定によるFe-Pt合金の圧力下の磁性2005

    • Author(s)
      石松直樹, 他4名
    • Organizer
      第46回高圧討論会
    • Place of Presentation
      室蘭工業大学,室蘭市
    • Year and Date
      2005-10-30
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2005-04-01   Modified: 2016-04-21  

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