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Surface chemical control and characterization of magnetism of nano-scale thin films, wires and clusters

Research Project

Project/Area Number 15087211
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionInstitute for Molecular Science (2004-2006)
Okazaki National Research Institutes (2003)

Principal Investigator

YOKOYAMA Toshihiko  Institute for Molecular Science, Department of Materials Molecular Science, Professor, 物質分子科学研究領域, 教授 (20200917)

Co-Investigator(Kenkyū-buntansha) NISHI Nobuyuki  Institute for Molecular Science, Department of Materials Molecular Science, Professor, 物質分子科学研究領域, 教授 (60013538)
TSUKUDA Tatsuya  Institute for Molecular Science, Department of Materials Molecular Science, Associate Professor, 物質分子科学研究領域, 助教授 (90262104)
Project Period (FY) 2003 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥54,400,000 (Direct Cost: ¥54,400,000)
Fiscal Year 2006: ¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 2005: ¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 2004: ¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 2003: ¥13,600,000 (Direct Cost: ¥13,600,000)
KeywordsMagnetic Thin Films / Photoelectron Emission Microscopy / Magnetic Circular Dichroism / Magnetic Nanowire / Magnetic Nanocluster / Ultrafast Time Resolved Spectromicroscopy / 光電子顕微 / 磁気光学Kerr効果 / X線磁気円二色性 / 走査トンネル顕微鏡(STM)
Research Abstract

The main subject of the present research is to control the magnetism of magnetic thin films, nanowires and nanoclusters by means of surface chemical techniques such as adsorption of atoms and molecules and surface reactions. Especially, adsorption induced spin reorientation transitions have been investigated from the microscopic point of view. Throughout this project, we discovered a novel important phenomenon, which provides a new characterization technique for nanoscale magnetism. We have found surprising enhancement of the ultraviolet magnetic circular dichroism (MCD) of the photoemission near the work function threshold. The photoemission MCD allows us to observe nanoscale magnetism using photoelectron emission microscopy (PEEM), whose typical special resolution is 10〜40 nm. Usually, MCD PEEM measurements have been performed using third-generation synchrotron radiation soft x rays as a light source, limiting the availability of this method. Moreover, time-resolving power using sync … More hrotron radiation cannot reach subpicosecond (-70 ps in ESRF), which is easily overcome by using ultraviolet lasers. The fact that the enhancement of the UV photoemission MCD was not discovered may be attributed to the poor preconcept that the UV MCD is weak due to small spin-orbit coupling in the valence shell and to the experimental finding that the UV MCD is actually weak when the photon energy is not tuned correctly. In the present study, we found noticeable enhancements of the UV photoemission MCD from Fe, Co and Ni films, which were justified by means of simple band-structure calculations including spin-orbit couplings. The enhancements are as much as two orders of magnitude compared to the usual condition (no photon energy tuning), and the MCD contrast in Ni films amounts as much as 10%. We have constructed UV MCD PEEM systems and have successfully observed beautiful magnetic domain images in. Cs-coated Ni films on Cu(001). We are now preparing a femtosecond time-resolving setup. Less

Report

(5 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (36 results)

All 2007 2006 2005 2004 Other

All Journal Article (28 results) Book (2 results) Patent(Industrial Property Rights) (2 results) Publications (4 results)

  • [Journal Article] Measurements of threshold photoemission magnetic dichroism using ultraviolet lasers and a photo elastic modulator2007

    • Author(s)
      T.Nakagawa, T.Yokoyama, M.Hosaka, M.Katoh
    • Journal Title

      Rev. Sci. Instrum. 78

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Measurements of threshold photoemission magnetic dichroism using ultraviolet lasers and a photoelastic modulator2007

    • Author(s)
      T.Nakagawa, T.Yokoyama, M.Hosaka, M.Katoh
    • Journal Title

      Rev. Sci. Instrum. 78, 023907

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 内殻分光-元素選択性をもつX線内殻分光の歴史・理論・実験法・応用2007

    • Author(s)
      T.Ota, T.Yokoyama
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Measurements of threshold photoemission magnetic dichroism using ultraviolet lasers and a photoelastic modulator2007

    • Author(s)
      T.Nakagawa, T.Yokoyama, M.Hosaka, M.Katoh
    • Journal Title

      Rev. Sci. Instrum. 78

      Pages: 23907-23907

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Magnetic circular dichroism near the Fermi level2006

    • Author(s)
      T.Nakagawa, T.Yokoyama
    • Journal Title

      Phys. Rev. Lett. 96

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] X-Ray Magnetic Circular Dichroism of Size-Selected, Thiolated Gold Clusters2006

    • Author(s)
      Y.Negishi, H.Tsunoyama, M.Suzuki, N.Kawamura, M.M.Matsushita, K.Maruyama, T.Sugawara, T.Yokoyama, T.Tsukuda
    • Journal Title

      J. Am. Chem. Soc. 128

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Annual Research Report 2006 Final Research Report Summary
  • [Journal Article] Synthesis, structures and magnetic properties of carbon-encapsulated nanoparticles via thermal decomposition of metal acetylide2006

    • Author(s)
      J.Nishijo, C.Okabe, O.Oishi, N.Nishi
    • Journal Title

      Carbon 44

      Pages: 2943-2949

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Ad atom-induced spin reorientation transitions and spin canting in Co films on a stepped Cu(001) surface2006

    • Author(s)
      T.Nakagawa, H.Watanabe, T.Yokoyama
    • Journal Title

      Phys. Rev. B74

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Magnetic circular dichroism near the Fermi level2006

    • Author(s)
      T.Nakagawa, T.Yokoyama
    • Journal Title

      Phys. Rev. Lett. 96, 237402

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Adatom-induced spin reorientation transitions and spin canting in Co filmson a stepped Cu(001) surface2006

    • Author(s)
      T.Nakagawa, H.Watanabe, T.Yokoyama
    • Journal Title

      Phys. Rev. B74

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Magnetic circular dichroism near the Fermi level2006

    • Author(s)
      T.Nakagawa, T.Yokoyama
    • Journal Title

      Phys. Rev Lett. 96

      Pages: 237402-237402

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Effect of surface chemisorption on the spin reorientation transition in magnetic ultrathin Fe film on Ag(001)2006

    • Author(s)
      X.-D.Ma, T.Nakagawa, T.Yokoyama
    • Journal Title

      Surf. Sci. 600

      Pages: 4605-4612

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Adatom-induced spin reorientation transitions and spin canting in Co films on a stepped Cu(001) surface2006

    • Author(s)
      T.Nakagawa, H.Watanabe, T.Yokoyama
    • Journal Title

      Phys. Rev. (2006) B74

    • Related Report
      2006 Annual Research Report
  • [Journal Article] X線磁気円二色性、磁気光学Kerr効果による磁性超薄膜のスピン再配列相転移2006

    • Author(s)
      中川剛志, 横山利彦
    • Journal Title

      表面科学 27

      Pages: 272-277

    • NAID

      10017488015

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Glutathione-Protected Gold Clusters Revisited : Bridging the Gap between Gold(I)-Thiolate Complexes and Thiolate-Protected Gold Nanocrystals2005

    • Author(s)
      Y.Negishi, K.Nobusada, T.Tsukuda
    • Journal Title

      J. Am. Chem. Soc. 127

      Pages: 5261-5270

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Glutathione-Protected Gold Clusters Revisited : Bridging the Gap between Gold(I)-Thiolate Complexes and Thiolate-Protected Gold Nanocrystals2005

    • Author(s)
      Y.Negishi, K.Nobusada, T.Tsukuda
    • Journal Title

      J Am. Chem. Soc. 127

      Pages: 5261-5270

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Opposite spin reorientation transitions driven by a magnetic orbital moment : Ultrathin Ni films on Cu surfaces2005

    • Author(s)
      T.Nakagawa, H.Watanabe, T.Yokoyama
    • Journal Title

      Phys.Rev.B 71

      Pages: 235403-235403

    • Related Report
      2005 Annual Research Report
  • [Journal Article] CO Induced Spin Reorientation Transition of Co/Pd(111) Studied by XMCD and XPS2005

    • Author(s)
      D.Matsumura, T.Yokoyama et al.
    • Journal Title

      Phys.Script. T115

      Pages: 583-585

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Direct Observation of Magnetic Depth Profile with a Depth-Resolved X-Ray Magnetic Dichroism Technique2005

    • Author(s)
      K.Amemiya, T.Yokoyama et al.
    • Journal Title

      Phys.Script. T115

      Pages: 1035-1037

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Spin-reorientation transition of Ni/Cu(100) and CO/Ni/Cu(100) : Separation of the surface and bulk components of the x-ray magnetic circular dichroism spectrum2005

    • Author(s)
      K.Amemiya, T.Yokoyama et al.
    • Journal Title

      Phys.Rev.B 71

      Pages: 214420-214420

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Electronic states and local structures of the photomagnetic Cu-Mo cyanides Cu_2Mo(CN)_8・H_2O and Cs_<0.5>Cu_<1.75>Mo(CN)_8・1.5H_2O studied by x-ray absorption fine structure spectroscopy2005

    • Author(s)
      X.-D.Ma, T.Yokoyama et al.
    • Journal Title

      Phys.Rev.B 72

      Pages: 94107-94107

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Effect of Adsorbate Carbon on Spin Reorientation Transitions in Cu-Capped Ultrathin Ni Films on Cu(001)2005

    • Author(s)
      T.Nakagawa, H.Watanabe, T.Yokoyama
    • Journal Title

      Surf.Sci. 599

      Pages: 262-269

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Opposite spin reorientation transitions driven by magnetic orbital moment : ultrathin Ni films on Cu surfaces2005

    • Author(s)
      T.Nakagawa, T.Yokoyama et al.
    • Journal Title

      Phys.Rev.B (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Direct observation of magnetic depth profiles of thin Fe films on Cu(100) and Ni/Cu(100) with the depth-resolved x-ray magnetic circular dichroism2004

    • Author(s)
      K.Amemiya, T.Yokoyama et al.
    • Journal Title

      Appl.Phys.Lett. 84

      Pages: 936-938

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Direct observation of oscillatory behavior in the surface magnetization of Fe thin films grown on a Ni/Cu(100) film2004

    • Author(s)
      K.Amemiya, T.Yokoyama et al.
    • Journal Title

      Phys.Rev.B 70

      Pages: 195405-195405

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Structure and magnetic properties of the single-molecule magnet [Mn_<11>CrO_<12>(O_2CCH_3)_<16>(H_2O)_4]・2CH_3COOH・4H_2O2004

    • Author(s)
      H.Hachisuka, T.Yokoyama et al.
    • Journal Title

      Phys.Rev.B 70

      Pages: 104427-104427

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Formation of Air Stable Carbon-skinned Iron Nanocrystals from FeC_22004

    • Author(s)
      K.Kosugi, M.J.Bushiri, N.Nishi
    • Journal Title

      Appl.Phys.Lett. 84

      Pages: 1753-1755

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Magic-numbered gold clusters protected by glutathione monolayers (n=18,21,25,28,32,39)2004

    • Author(s)
      Y.Negishi, Y.Takasugi, S.Sato, H.Yao, K.Kimura, T.Tsukuda
    • Journal Title

      J.Am.Chem.Soc. 126

      Pages: 6518-6519

    • Related Report
      2004 Annual Research Report
  • [Book] 内殻分光-元素選択性をもつX線内殻分光の歴史・理論・実験法・応用-2007

    • Author(s)
      太田俊明, 横山利彦編著
    • Total Pages
      322
    • Publisher
      アイ・ビー・シー出版
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Book] 内殻分光-元素選択性をもつX線内殻分光の歴史・理論・実験法・応用-2007

    • Author(s)
      太田俊明, 横山利彦編著
    • Total Pages
      322
    • Publisher
      アイ・ピー・シー出版
    • Related Report
      2006 Annual Research Report
  • [Patent(Industrial Property Rights)] 紫外磁気円二色性測定方法, 磁気円二色性光電子放出顕微鏡、及び磁気円二色性光電子放出顕微鏡システム2006

    • Inventor(s)
      横山利彦, 中川剛志
    • Industrial Property Rights Holder
      横山利彦, 中川剛志, 自然科学研究機構
    • Industrial Property Number
      2006-241724
    • Filing Date
      2006-09-06
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 紫外磁気円二色性測定方法、磁気円二色性光電子放出顕微鏡、及び磁気円二色性光電子放出顕微鏡システム2006

    • Inventor(s)
      横山利彦, 中川剛志
    • Industrial Property Rights Holder
      横山利彦, 中川剛志, 自然科学研究機構
    • Industrial Property Number
      2006-241724
    • Filing Date
      2006-09-06
    • Related Report
      2006 Annual Research Report
  • [Publications] T.Yokoyama, D.Matsumura, K.Amemiya, S.Kitagawa, N.Suzuki, T.Ohta: "Spin reorientation transitions of ultrathin Co/Pd(111) films induced by chemisorption : x-ray magnetic circular dichroism study"J.Phys.Condens.Matter. 15. S537-S546 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Amemiya, S.Kitagawa, D.matsumura, T.Yokoyama, T.Ohta: "Development of a depth-resolved x-ray magnetic circular dichroism : application to Fe/Cu(100) ultrathin films"J.Phys.Condens.Matter. 15. S561-S572 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Okamoto, K.Kohdate, K.Nagai, J.Miyawaki, H.Kondoh, T.Yokoyama, A.Nojima, T.Ohta: "Development of light-modulated XAFS spectroscopy"J.Synchrotron Radiat.. 10. 242-247 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Yokoyama, K.Takahashi, O.Sato: "Metastable photoinduced phase of Cu(II) ethylenediamine complexes studied by x-ray-absorption fine-structure spectroscopy"Phys.Rev.B. 67. 172104 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2018-03-28  

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