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oai:recercat.cat:2445/220942025-12-04T20:48:26Zcom_2072_1057col_2072_478822col_2072_478917

Magnetic behaviour of ferromagnets with random anisotropy Tejada Palacios, Javier Martínez Perea, Benjamin Labarta, Amílcar Grössinger, R. Hernando, Antonio, 1947- Propietats magnètiques Terres rares Magnetic properties Rare earths Anisotropy Ferromagnetism Anisotropia Ferromagnetisme 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. 2012-02-16T08:49:39Z 2012-02-16T08:49:39Z 1990 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció digital del document proporcionada per AIP i http://dx.doi.org/10.1063/1.346036 Journal of Applied Physics, 1990, vol. 67, núm. 9, p. 5984-5986 http://dx.doi.org/10.1063/1.346036 (c) American Institute of Physics, 1990 info:eu-repo/semantics/openAccess American Institute of Physics Articles publicats en revistes (Física de la Matèria Condensada)