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Relationship between coercivity and magnetic moment of superparamagnetic particles with dipolar interaction

 

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Opened Access Relationship between coercivity and magnetic moment of superparamagnetic particles with dipolar interaction
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Author: Conde Amiano, Alejandro
Conde Amiano, Clara Francisca
Franco García, Victorino
Department: Universidad de Sevilla. Departamento de Física de la Materia Condensada
Date: 2005-11-22
Published in: Physical Review B, 72,  174424
Document type: Article
Abstract: The temperature dependence of the hysteresis loops of Nanoperm-type alloys has been studied. In the high-temperature region above the coercivity maximum, the response of the system can be modeled as that of dipolar-interaction superparamagnetic particles, considering a mean interaction field. Special attention has been paid to the influence of the particle size distribution on the applicability of the mean-field model. The two main effects of the dipolar interaction (coercivity and distortion of the thermal dependence of the apparent magnetic moment) have been correlated.
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URI: http://hdl.handle.net/11441/33384

DOI: http://dx.doi.org/10.1103/PhysRevB.72.174424

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