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Type: Artigo de periódico
Title: A Novel Method For Identifying The Local Magnetic Viscosity Process Of Heterogeneous Magnetic Nanostructures
Author: Beron F.
De Oliveira L.A.S.
Knobel M.
Pirota K.R.
Abstract: The relaxation mechanism known as magnetic viscosity has been attracting the attention of the scientific community for more than seven decades. However, a complete model to fully describe the phenomenon is difficult to achieve, owing to its possible different sources and microscopic mechanisms. This work proposes a new experimental approach, based on the combination of static and dynamic first-order reversal curve diagrams. With this technique, one can decouple the responsible mechanism presented by different phases of an inhomogeneous magnetic sample. Moreover, it can also be used to distinguish the microscopic origin of magnetic viscosity (i.e. eddy currents or thermal activation). We successfully applied this novel approach to characterize the local viscosity processes occurring in a nanocrystalline Fe-based soft magnetic ribbon. Owing to the generality of its principles, it can be used to investigate the viscosity of a wide range of systems. © 2013 IOP Publishing Ltd.
Rights: fechado
Identifier DOI: 10.1088/0022-3727/46/4/045003
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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