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TEMPERATURE-DEPENDENT HIGH-RESOLUTION PHOTOEMISSION SPECTROSCOPY OFYbXCu4(X=In, Cd, Mg)

Author

Listed:
  • H. SATO

    (Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan)

  • Y. NISHIKAWA

    (Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan)

  • F. NAGASAKI

    (Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan)

  • H. FUJINO

    (Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan)

  • Y. TAKEDA

    (Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan)

  • M. ARITA

    (Hiroshima Synchrotron Radiation Center, Hiroshima University, Kagamiyama 2-313, Higashi-Hiroshima 739-8526, Japan)

  • K. SHIMADA

    (Hiroshima Synchrotron Radiation Center, Hiroshima University, Kagamiyama 2-313, Higashi-Hiroshima 739-8526, Japan)

  • H. NAMATAME

    (Hiroshima Synchrotron Radiation Center, Hiroshima University, Kagamiyama 2-313, Higashi-Hiroshima 739-8526, Japan)

  • A. KIMURA

    (Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan)

  • M. TANIGUCHI

    (Graduate School of Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526, Japan;
    Hiroshima Synchrotron Radiation Center, Hiroshima University, Kagamiyama 2-313, Higashi-Hiroshima 739-8526, Japan)

  • K. HIRAOKA

    (Faculty of Engineering, Ehime University, Bunkyo-cho 3, Matsuyama 790-8577, Japan)

  • K. KOJIMA

    (Faculty of Integrated Arts and Sciences, Hiroshima University, Kagamiyama 1-7-1, Higashi-Hiroshima 739-8521, Japan)

Abstract

Valence-band and Yb 4d photoemission spectra ofYbXCu4(X=In, Cd, Mg) have been measured with high energy resolution from 10 to 300 K. In the valence-band photoemission spectra ofYbInCu4andYbCdCu4, the structure due to theYb2+4f7/2states is clearly observed near the Fermi level(EF)at 10 K. The intensity of theYb2+4f7/2structure decreases with increasing temperature and the structure almost disappears at 300 K. The amount of the enhancement from 50 to 107 K is much stronger forYbInCu4than forYbCdCu4. On the other hand, theYb2+4f7/2structure ofYbMgCu4is observed as a broad peak nearEFand the spectra show little temperature dependence. In the Yb 4d photoemission spectra ofYbInCu4andYbCdCu4, the structures due to theYb2+andYb3+states are recognized. The intensity ratioYb2+/Yb3+increases with decreasing temperature. In the Yb 4d spectra ofYbMgCu4, on the other hand, almost only structures due toYb2+states are observed.

Suggested Citation

  • H. Sato & Y. Nishikawa & F. Nagasaki & H. Fujino & Y. Takeda & M. Arita & K. Shimada & H. Namatame & A. Kimura & M. Taniguchi & K. Hiraoka & K. Kojima, 2002. "TEMPERATURE-DEPENDENT HIGH-RESOLUTION PHOTOEMISSION SPECTROSCOPY OFYbXCu4(X=In, Cd, Mg)," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 9(02), pages 1079-1083.
    • Handle: RePEc:wsi:srlxxx:v:09:y:2002:i:02:n:s0218625x02003378
    DOI: 10.1142/S0218625X02003378
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