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Spin-selective XAFS: a noble analytical method for magnetic nano-particles

Research Project

Project/Area Number 17510094
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Nanomaterials/Nanobioscience
Research InstitutionJapan Women's University (2006)
Tohoku University (2005)

Principal Investigator

HAYASHI Hisashi  Japan Women's Univ., Fac. of Sci., Asso. Prof., 理学部, 助教授 (60250833)

Co-Investigator(Kenkyū-buntansha) BALACHANDRAN Jeyadevan  Tohoku Univ., Graduate School of Environmental Studies, Prof., 大学院環境科学研究科, 教授 (80261593)
SHINODA Kozo  Tohoku Univ., IMRAM, Lecturer, 多元物質科学研究所, 講師 (10311549)
Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2006: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2005: ¥3,000,000 (Direct Cost: ¥3,000,000)
KeywordsSpin-selective XAFS / Resonant inelastic x-ray scattering / X-ray spectrometer with high-sensitivity / X-ray satellites / Magnetic nano-particles
Research Abstract

This project aims to establish spin-selective XAFS spectroscopy as a method of characterizing the magnetic and electronic structure of magnetic nano-particles. Here it is necessary to develop high-resolution x-ray spectrometers with large acceptance in order to measure generally weak Kβ-emissions of 3d elements.
In 2005, our own dispersive-type spectrometer was modified for detecting Kβ-emissions, and was utilized for observing resonant inelastic x-ray scattering (RIXS) of several standard materials to deduce their spin-selective XAFS. Through these measurements, it has been achieved to ultimately suppress lifetime-broadenings, and to obtain polarized spin-selective XAFS for single-crystal of LaMnO_3. On the other hand, it has been found that magnetic nano-particles are unstable for incident x-rays produced by synchrotron sources. The instability made it difficult to precisely obtain the spin-selective XAFS of the particles.
Thus, in 2006, a focusing-type spectrometer was made by rebuilding the dispersive-type spectrometer, and was named as 'Peacock' after its shape. By using the 'Peacock', lifetime-broadening-suppressed XAFS spectra of CuO nano-particles on ZnO with various Cu concentrations up to as low as 1 mol% were obtained from their RIXS. Similar experiments for a basic high-Tc system, La_<2-x>Sr_xCuO_4 (LSCO) reveal that 1s-3d excitation of LSCO is very sensitive Sr-concentration and polarization. After these preliminary studies to demonstrate the high-sensitivity of 'Peacock', spin-selective XAFS spectra of magnetic nano-materials of several Fe oxides were measured within fairly short periods. Here almost no radiation-damage was distinguishable. Based on the data obtained, papers are now in preparation.

Report

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

    (18 results)

All 2007 2006 2005

All Journal Article (17 results) Book (1 results)

  • [Journal Article] Selective XAFS Studies of Functional Materials by Resonant Inelastic X-Ray Scattering2007

    • Author(s)
      H.Hayashi
    • Journal Title

      AIP Conference Proceedings 882

      Pages: 833-837

    • 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] Spin-polarized Mn K-edge XANES analysis of Mn oxides2007

    • Author(s)
      A.Sugiyama et al.
    • Journal Title

      J. Magn. Mag. Mat. 310

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Selective XAFS Studies of Functi onal Materials by Resonant Inelastic X-Ray Scattering2007

    • Author(s)
      H.Hayashi
    • Journal Title

      AIP Conference Proceedings 882

      Pages: 833-837

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Inelastic x-ray scattering spectroscopy2007

    • Author(s)
      Y.Udagawa, H.Hayashi
    • Journal Title

      In "Inner-shell spectroscopy" ed. by T. Ohta and T. Yokoyama (IPC, Tokyo)

      Pages: 277-298

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Spin-polarized Man K-edge XANES analysis of Mn oxides2007

    • Author(s)
      A.Sugiyama et al.
    • Journal Title

      J. Magn. Mag. Mat. 310

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Local spin-ordering in antiferromagnetic as well as paramagnetic LaMnO_3 phase revealed by polarized spin-selected 1s-3d absorption spectra2006

    • Author(s)
      H.Hayashi et al.
    • Journal Title

      Phys. Rev. B 73

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Polarized lifetime-broadening-suppressed XANES study of La_<2-x>MS_xCuO_42006

    • Author(s)
      H.Hayashi et al.
    • Journal Title

      Rad. Phys. Chem 75(11)

      Pages: 1586-1590

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Local spin-ordering in antiferromagnetic as well as paramagnetic LaMnO3 phase revealed by polarized spin-selected 1s-3d absorption spectra2006

    • Author(s)
      H.Hayashi et al.
    • Journal Title

      Phys. Rev. B 73

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Polarized lifetime-broadenin g-suppressed XANES study of La_<2-x>Sr_xCuO_42006

    • Author(s)
      H.Hayashi et al.
    • Journal Title

      Rad. Phys. Chem. 75(11)

      Pages: 1586-1590

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Polarized lifetime-broadening-suppressed XANES study of La_<2-x>Sr_xCuO_42006

    • Author(s)
      H.Hayashi et al.
    • Journal Title

      Rad. Phys. Chem 75(11)

      Pages: 1586-1590

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Local spin-ordering in antiferromagnetic as well as paramagnetic LaMnO_3 phase revealed by polarized spin-selected is-3d absorption spectra2006

    • Author(s)
      H.Hayashi et al.
    • Journal Title

      Phys.Rev.B (印刷中)

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Observation of fine structure in quadrupolar transition of Ho L_3 pre-edge by lifetime-broadening-suppressed XANES spectroscopy2005

    • Author(s)
      H.Hayashi et al.
    • Journal Title

      Phys. Rev. B 72

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Selective XANES spectroscopy from RIXS contour maps2005

    • Author(s)
      H.Hayashi et al.
    • Journal Title

      J. Phys. Chem. Solids 66

      Pages: 2168-2172

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Observation of fine structure in quadrupolar transition of Ho L3 pre-edge by lifetime-broadening-suppressed XANES spectroscopy2005

    • Author(s)
      H.Hayashi et al.
    • Journal Title

      Phys. Rev. B 72

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Observation of fine structure in quadrupolar transition of Ho L_3 pre-edge by lifetime-broadening-suppressed XANES spectroscopy2005

    • Author(s)
      H.Hayashi et al.
    • Journal Title

      Phys.Rev.B 72

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Selective XANES spectroscopy from RIXS contour maps2005

    • Author(s)
      H.Hayashi et al.
    • Journal Title

      J.Phys.Chem.Solids 66

      Pages: 2168-2172

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 「微分型」X線ラマン散乱分光の試み2005

    • Author(s)
      林 久史 等
    • Journal Title

      X線分析の進歩 36

      Pages: 259-266

    • NAID

      40006919963

    • Related Report
      2005 Annual Research Report
  • [Book] 内殻分光(うち6.5章を分担執筆)2007

    • Author(s)
      宇田川 康夫, 林 久史
    • Total Pages
      328
    • Publisher
      アイピーシー
    • 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

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

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