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High-temperature evolution of coercivity in nanocrystalline alloys.

Opened Access High-temperature evolution of coercivity in nanocrystalline alloys.

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Autor: Franco García, Victorino
Kiss, Lászlo Ferenc
Kemény, T.
Vincze, imre
Conde Amiano, Clara Francisca
Conde Amiano, Alejandro
Departamento: Universidad de Sevilla. Departamento de Física de la Materia Condensada
Fecha: 2002
Publicado en: Physical Review B, 66 (22), 2244181- 2244188
Tipo de documento: Artículo
Resumen: The temperature evolution of the coercivity of a Finemet-type alloy, in which 10 at. % Fe has been substi- tuted by Cr and annealed at different temperatures, has been studied. In the temperature region above the coercivity maximum, the experimental hysteresis loops have been successfully fitted by a combination of two models which use effective field controlled memory effects and temperature rescaling to describe dipolarly interacting superparamagnetic particles. It is shown that the characteristic parameters of these two models ~ interaction temperature and interaction field ! are interrelated. A consistent two-step fitting procedure was developed which yielded physically meaningful values for the temperature dependence of the magnetic mo- ment of the particles.
Tamaño: 77.64Kb
Formato: PDF

URI: http://hdl.handle.net/11441/33444

DOI: http://dx.doi.org/10.1103/PhysRevB.66.224418

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