Ferromagnetism of Manganese–Silicide Nanopariticles in Silicon
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概要
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The annealing-temperature (700–900 °C) dependence of the ferromagnetism of manganese-implanted silicon is investigated. In the annealed samples, the manganese-containing nanoparticles, whose mean size was found to get bigger with temperature, are formed and these samples show ferromagnetism. We obtain evidence that the samples annealed at 800–850 °C produce two kinds of ferromagnets and that one of them offers a coercivity as high as 2500 Oe, suggesting the possibility of Si-based nanostructures with stable ferromagnetism. The origin of these ferromagnetisms is also discussed in conjunction with the size distribution of the nanoparticles.
- 2008-06-25
著者
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Nagase Masao
Ntt Basic Research Laboratories
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Ono Yukinori
NTT Basic Research Laboratories
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Fujiwara Akira
Ntt Basic Research Laboratories Ntt Corporation
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Kageshima Hiroyuki
Ntt Basic Research Laboratories
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Ohta Eiji
Department Of Agricultural Chemistry Faculty Of Agriculture Kyoto University
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Kageshima Hiroyuki
NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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Yabuuchi Shin
NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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Ohta Eiji
Department of Applied Physics and Physico-Informatics, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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Nagase Masao
NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi, Kanagawa 243-0198, Japan
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