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K. Fujishiro
Department of Physics, Waseda Univ.
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Y. Uesu
Department of of Physics, Waseda Univ.
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S. Mori
Department of Physics, Tokyo Institute of Technologya
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Y. Koyama
Kagami Memorial Laboratory for Materials Science, Waseda University
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N. Yamamoto
Department of Physics, Tokyo Institute of Technologya