The Magnetization of Amorphous Gd_XY_<68-X>Cu_<32> Alloys
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概要
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We report on the magnetization measurement of amorphous Gd.Y.. .Cu..(l73A'368) alloys between 4.2K and 300K in fields up to 7T. This system variesfrom ferromagnetic to cluster glass states with decreasing X. The high field magnetiza-lion in a cluster glass region as well as in a ferromagnetic phase is described well interms of the spin wave T"' law corrected for the applied field. The spin wave stiffnessconstant D thus deduced is independent of field and temperature. We have found thefollowing features in some Gd-based alloys: an amorphous material shows a smallerD value than a crystalline counterpart; in both states, D is directly proportional to theparamagnetic Curie temperature. These facts are quantitatively understood by thenearest neighbor Heisenberg model with fluctuations in the exchange interaction.
- 社団法人日本物理学会の論文
- 1988-07-15
著者
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Nakai Ikuo
Department Of Electrical And Electonic Engineering Tottori University
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Nakai Ikuo
Department Of Physics University Of Southampton:department Of Physics Faculty Of Science Okayama University:department Of Physics Faculty Of General Education Tottori University
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