Long-Time Variation of Magnetization in Concentrated Spin-Glasses(Condensed Matter : Electronic Structure, Electrical, Magnetic and Optical Properties)
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概要
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Time variations of magnetization M(t) in reentrant spin-glass (RSG) alloys Fe_<65>(Ni_<0.866>Mn_<0.134>)_<35>, Fe_<65>(Ni_<0.60>Mn_<0.40>)_<35> and Fe_<0.70>Al_<0.30>, together with a typical spin-glass alloy Cu_<0.95>Mn_<0.05>, have been measured under various combinations of temperature (T), magnetic field (H) and waiting time (t_w). The observed M(t) for all samples under various combinations of T, H and t_w can be traced by a newly proposed function within the time range 12<t<10^5s. The time variation behavior for each measurement is well represented by a characteristic time t_<max> which corresponds to the maximum position of the relaxation rate S(t). The characteristics of long-time variation of M(t) in the RSG materials have been discussed based on a magnetic cluster model.
- 社団法人日本物理学会の論文
- 2005-06-15
著者
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MOTOYA Kiyoichiro
Department of Metal Science and Technology,Kyoto University
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Motoya Kiyoichiro
Department Of Metal Science And Technology Kyoto University:institute For Solid State Physics Univer
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Motoya Kiyoichiro
Tokyo Univ. Sci. Chiba
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HIOKI Keiko
Department of Physics, Faculty of Science and Technology, Tokyo University of Science
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Hioki Keiko
Department Of Physics Faculty Of Science And Technology Tokyo University Of Science
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HIOKI Keiko
Department of Physics, Faculty of Science and Technology, Tokyo University of Science:(Present address)Nihon Densan Co., Ltd.
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