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Akira Onodera
Department of Physics, Faculty of Science, Hokkaido University, Sapporo 060
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Norihiko Tamaki
Department of Physics, Faculty of Science, Hokkaido University, Sapporo 060
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Haruyasu Yamashita
Department of Electronics and Information Engineering, Faculty of Engineering, Hokkai–Gakuen University, Sapporo 064
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Akihiro Terashita
Department of Electronics and Information Engineering, Faculty of Engineering, Hokkai–Gakuen University, Sapporo 064
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Kiyoshi Matsuki
Department of Physics, Hokkaido University of Education, Hakodate 040
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Toshihiko Takama
Department of Applied Physics, Faculty of Engineering, Hokkaido University, Sapporo 060