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Soft X-ray Magnetic Circular Dichroism and Photoemission Studies of II–VI Diluted Ferromagnetic Semiconductor Zn1−x Cr x Te

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Abstract

The electronic structure of the Cr ions in Zn1−x Cr x Te (x=0.03 and 0.15) has been investigated using X-ray magnetic circular dichroism (XMCD) and photoemission spectroscopy. Magnetic-field (H) and temperature (T) dependences of the Cr L 2,3 XMCD spectra well corresponded to the behavior of the magnetization measured by a SQUID magnetometer. The line shape of the Cr L 2,3 XMCD spectra was independent of H,T, and x, indicating that the ferromagnetism was originated from the same Cr electronic states independent of Cr concentration. The Cr 3d partial density of states (DOS) showed a peak at the top of the valence band but there was no DOS at the Fermi level, corresponding to their insulating behaviors.

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Authors and Affiliations

  1. Department of Physics and Department of Complexity Science and Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan

    M. Kobayashi, Y. Ishida, J. I. Hwang, G. S. Song & A. Fujimori

  2. National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan

    C.-S. Yang, L. Lee, H.-J. Lin, D.-J. Huang & C. T. Chen

  3. Synchrotron Radiation Research Unit, Japan Atomic Energy Agency, Sayo-gun, Hyogo, 679-5148, Japan

    Y. Takeda, K. Terai, S.-I. Fujimori, T. Okane & Y. Saitoh

  4. Japan Synchrotron Radiation Research Institute, Kouto 1-1-1, Mikaduki-cho, Sayou-gun, Hyogo, 679-5148, Japan

    K. Kobayashi

  5. Department of Quantum Matter, ADSM, Hiroshima University, Hagashi-Hiroshima, 739-8530, Japan

    A. Tanaka

  6. NanoElectronics Research Institute, AIST, Tsukuba Central 2, Umezono 1-1-1, Tsukuba, Ibaraki, 305-8568, Japan

    H. Saito & K. Ando

Authors
  1. M. Kobayashi
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  2. Y. Ishida
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  3. J. I. Hwang
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  4. G. S. Song
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  5. A. Fujimori
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  6. C.-S. Yang
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  7. L. Lee
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  8. H.-J. Lin
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  9. D.-J. Huang
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  10. C. T. Chen
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  11. Y. Takeda
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  12. K. Terai
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  13. S.-I. Fujimori
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  14. T. Okane
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  15. Y. Saitoh
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  16. K. Kobayashi
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  17. A. Tanaka
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  18. H. Saito
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  19. K. Ando
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Correspondence to M. Kobayashi.

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Kobayashi, M., Ishida, Y., Hwang, J.I. et al. Soft X-ray Magnetic Circular Dichroism and Photoemission Studies of II–VI Diluted Ferromagnetic Semiconductor Zn1−x Cr x Te. J Supercond Nov Magn 20, 467–471 (2007). https://doi.org/10.1007/s10948-007-0287-7

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  • DOI: https://doi.org/10.1007/s10948-007-0287-7

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