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Magnetic behaviour of ferromagnets with random anisotropy

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This article reports on a magnetometric study of the effects of diluted local random anisotropy in a ferromagnetic Fe80B20 amorphous matrix. In the low‐temperature and low‐field regime the samples, Fe74RE6B20 (RE=Nd, Ce), show a very rich behavior as a consequence of the competition between, and different dependence on T, of the correlation length associated with local random anisotropy and exchange interactions. In the high‐field regime (Happlied≥1.5 kOe) we observe ferromagnetic behavior with the saturation magnetization varying with temperature according to Bloch’s law. The spin wave stiffness constant D could be determined and lies close to 100 meVÅ2.

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Reproducció digital del document proporcionada per AIP i http://dx.doi.org/10.1063/1.346036

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Articles publicats en revistes (Física de la Matèria Condensada)

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Magnetic behaviour of ferromagnets with random anisotropy