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1992 Fiscal Year Final Research Report Summary

Surface and Interface Magnetism Studied by Spin Polarized Light and Electrons

Research Project

Project/Area Number 03452042
Research Category

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

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

Principal Investigator

SUGA Shigemasa  Osaka University, Faculty of Eng. Sci., Professor, 基礎工学部, 教授 (40107438)

Co-Investigator(Kenkyū-buntansha) CHO Kikuo  Osaka University, Faculty of Eng. Sci., Professor, 基礎工学部, 教授 (60013489)
IMADA Shin  Osaka University, Faculty of Eng. Sci., Research Assistant, 基礎工学部, 助手 (90240837)
DAIMON Hiroshi  Osaka University, Faculty of Eng. Sci., Assoc. Professor, 基礎工学部, 助教授 (20126121)
Project Period (FY) 1991 – 1992
KeywordsSpin Polarized Electrons / Photoemission / Inverse Photoemission / Magnetic Circular Dichroism / MCD / Spin Exchange Splitting / Surface Magnetism / Interface Magnetism
Research Abstract

1: Development of a spin polarized electron gun A p-type GaAs single crystal was cleaned by Ar ion beam sputtering and then annealed in ultra-high vacuum of 10^<-10> Torr. Small amount of Cs was deposited onto it. Subsequent O_2 exposure realized a stable NEA(negative electron affinity) photo-cathode. The photoexcitation was done by a semiconductor laser. Life time(1/e) of the NEA cathode was about two hours after the Cs evaporation and the O_2 exposure was stopped at 20muA.
2: An electron spin analyzer of the diffuse scattering type by use of a Au thin film is manufactured. The asymmetry of the scattered beam is going to be detected by 4 independent Ceratrons. As an energy analyzer in front of the spin analyzer, we use a Jost type analyzer.
3: Magnetic thin film sample: We are now growing single crystal of Fe on Ag thin film grown onto Si(111) substrate. Magnetic circular dichroism measurement of the photoemission intensity and angular distribution by use of circularly polarized synchrotron radiation is under way at photon Factory.
4. Measurement of the exchange splitting of the 3d, 3s states were done on Mn_2Sb and MnAlGe. Inverse photoemission was fully employed for the measurement of the 3d state.
. Magnetic circular dichroism measurement of Mn 2p core states in the above Mn compounds was successfully done providing the different contributions of nonequivalent Mn sites.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 松下 智裕: "Resonance Photoemission Spectroscopy of Mn_2As,Cr_2As and Fe_2As" Jpn.J.Appl.Phys.31. 1767-1770 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 木村 昭夫: "Unoccupied Electronic States and Exchange Splitting of M_2As and MnAlGe" Solid State Commun.(1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅 滋正: "XPS and BIS Studies of Electronic Structures of Sm_3Se_4 and Sm_4As_3" Physica B. (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅 滋正: "XPS and BIS Stndies of CePd_2Al_3" Physica B. (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 菅 滋正: "Studies of Electronic Structures of Cu_2Sb Type Intermetiallic Compounds in Recent Advances in Magnetism of Transition Metal Compoumds" World Scientific、Singapore 分担執筆, 12(350) (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Matsusita Tomohiro: "Resonance Photoemission Spectroscopy of Mn_2As, Cr_2As and Fe_2As" Jpn. J. Appl. Phys.31. 1767-1770 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kimura Akio: "Unoccupied Electronic States and Exchange Splitting of M_2As and MnAlGe" Solid State Commun.(1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Suga Shigeemasa: "XPS and BIS Studies of Electronic Structures of Sm_3Se_4 and Sm_4As_3" Physica B. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Suga Shigemasa: "XPS and BIS Studies of CePd_2Al_3" Physica B. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Suga Shigemasa: World Scientific. Studies Electronic Structures of Cu_2Sb Type Intermetallic compounds Recent Advances in Magnetism of Transition Metal Compounds, 12350 (1993)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1994-03-24  

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