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Open AccessArticle

Magnetization Dynamics of Amorphous Ribbons and Wires Studied by Inductance Spectroscopy

Departamento de Materiales Metálicos y Cerámicos, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, D.F. 04510, Mexico
Materials 2011, 4(1), 37-54; https://doi.org/10.3390/ma4010037
Received: 5 November 2010 / Revised: 23 November 2010 / Accepted: 6 December 2010 / Published: 23 December 2010
(This article belongs to the Special Issue Amorphous Alloys)
Inductance spectroscopy is a particular formulation variant of the well known complex impedance formalism typically used for the electric characterization of dielectric, ferroelectric, and piezoelectric materials. It has been successfully exploited as a versatile tool for characterization of the magnetization dynamics in amorphous ribbons and wires by means of simple experiments involving coils for sample holding and impedance analyzer equipment. This technique affords the resolution of the magnetization processes in soft magnetic materials, in terms of reversible deformation of pinned domain walls, domain wall displacements and spin rotation, for which characteristic parameters such as the alloy initial permeability and the relaxation frequencies, indicating the dispersion of each process, can be defined. Additionally, these parameters can be correlated with chemical composition variation, size effects and induced anisotropies, leading to a more physical insight for the understanding of the frequency dependent magnetic response of amorphous alloys, which is of prime interest for the development of novel applications in the field of telecommunication and sensing technologies. In this work, a brief overview, together with recent progress on the magnetization dynamics of amorphous ribbons, wires, microwires and biphase wires, is presented and discussed for the intermediate frequency interval between 10 Hz and 13 MHz. View Full-Text
Keywords: amorphous alloys; magnetization dynamics; magnteoinductance; amorphous ribbons; amorphous wires amorphous alloys; magnetization dynamics; magnteoinductance; amorphous ribbons; amorphous wires
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Betancourt, I. Magnetization Dynamics of Amorphous Ribbons and Wires Studied by Inductance Spectroscopy. Materials 2011, 4, 37-54.

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