Violation of the Zener power law for linear magnetostriction in the weak random anisotropy magnets
A del Moral; C de la Fuente; J I Arnaudas; A del Moral; Magnetismo de Sólidos, Departamento de Física de Materia Condensada and Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza and Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain; C de la Fuente; Magnetismo de Sólidos, Departamento de Física de Materia Condensada and Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza and Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain; J I Arnaudas; Magnetismo de Sólidos, Departamento de Física de Materia Condensada and Instituto de Ciencia de Materiales de Aragón, Universidad de Zaragoza and Consejo Superior de Investigaciones Científicas, 50009 Zaragoza, Spain
Журнал:
Journal of Physics: Condensed Matter
Дата:
1996-09-09
Аннотация:
The linear magnetostriction has been measured in the intermetallic compounds. The Zener power law, which gives as proportional to the third power of the reduced magnetization, is found to be valid in the ferromagnetic phase of . For x < 1 the compounds are weak random anisotropy magnets, and in the quasisaturated regime induced by a magnetic field is still proportional to , but the exponent p is smaller than three. p increases with the field and approaches three in the high-field limit (12 T). A relation between the violation of the Zener power law and the reduction of the magnetization in the random anisotropy systems is derived, and is compared with the experimental results.
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