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N. Tomonaga
Faculty of Science, Tohoku Univ.
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O. Nakamura
Casio Computer Co, Ltd
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A. Ochiai
Institute for Material Reserch, Tohoku Univ.
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F. Stieglich
Darmastadt Univ.
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T. Suzuki
Faculty of Science, Tohoku Univ.
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T. Kasuya
Faculty of Science, Tohoku Univ.