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

Buznikov, N. A.; Antonov, A. S.; Granovsky, A. B.; Kim, C. G.; Kim, C. O.; Li, X. P.; Yoon, S. S.

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

Authors

Description

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.
10 pages, 3 figures