We have performed DC and AC magnetization measurements for the rare-earth magnetic alloy systems Gd0.62Y0.38, Tb0.86Y0.14, and Dy0.97Y0.03. These materials commonly exhibit a proper helical magnetic structure, and a ferromagnetic structure at lower temperatures. In all of these materials, a difference between zero-field-cooled (ZFC) magnetization and field-cooled (FC) magnetization and a hysteresis loop in the M-H curve have been observed in the helimagnetic phases. The non-equilibrium behavior is possibly caused by a common nature, e. g., chiral domain structures. In addition to the above behavior, strong non-linearity of the magnetization and slow spin dynamics have been observed around the Ńeel temperature only in Gd0.62Y0.38. The spin-glass like behavior observed in Gd0.62Y0.38 could be related to a novel glassy state such as a helical-glass state.
|出版ステータス||Published - 2015 1月 1|
|イベント||20th International Conference on Magnetism, ICM 2015 - Barcelona, Spain|
継続期間: 2015 7月 5 → 2015 7月 10
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