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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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TEJADA PALACIOS, Javier, et al. Magnetic behaviour of ferromagnets with random anisotropy. Journal of Applied Physics. 1990. Vol. 67, num. 9, pags. 5984-5986. ISSN 0021-8979. [consulted: 24 of July of 2026]. Available at: https://hdl.handle.net/2445/22094

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