Giant magnetoimpedance in composite wires with insulator layer between non-magnetic core and soft magnetic shell

Details Giant magnetoimpedance in composite wires with insulator layer between non-magnetic core and soft magnetic shell Giant magnetoimpedance in composite wires with insulator layer between non-magnetic core and soft magnetic shell

2005-11-16

arxiv.org/abs/cond-mat/0511386v1

J. Magn. Magn. Mater. 300 (2006) e63

Physics

Condensed Matter

Materials Science

10 pages, 3 figures

Scientific paper

10.1016/j.jmmm.2005.10.149

A method for calculation of the magnetoimpedance in composite wires having an insulator layer between non-magnetic core and soft magnetic shell is described. It is assumed that the magnetic shell has a helical anisotropy and the driving current flows through the core only. The distribution of eddy currents and expressions for the impedance are found by means of a solution of Maxwell equations taking into account the magnetization dynamics within the shell governed by the Landau-Lifshitz equation. The effect of the insulator layer on the magnetoimpedance is analyzed.

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