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Y. Nishida
Research Institute for Scientific Measurements, Tohoku Univ.
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K. Tsuda
Research Institute for Scientific Measurements, Tohoku Univ.
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M. Tanaka
Research Institute for Scientific Measurements, Tohoku Univ.
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A.P. Tsai
Institute for Materials Research, Tohoku Univ.
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A. Inoue
Institute for Materials Research, Tohoku Univ.
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T. Masumoto
Institute for Materials Research, Tohoku Univ.