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Title: Current distribution and giant magnetoimpedance in composite wires with helical magnetic anisotropy
Authors: Buznikov, N.A.
Antonov, A.S.
Granovsky, A.B.
Kim, C.G.
Kim, C.O.
Li, X.P. 
Yoon, S.S.
Keywords: Composite wires
Helical anisotropy
Issue Date: Jan-2006
Citation: Buznikov, N.A., Antonov, A.S., Granovsky, A.B., Kim, C.G., Kim, C.O., Li, X.P., Yoon, S.S. (2006-01). Current distribution and giant magnetoimpedance in composite wires with helical magnetic anisotropy. Journal of Magnetism and Magnetic Materials 296 (2) : 77-88. ScholarBank@NUS Repository.
Abstract: The giant magnetoimpedance effect in composite wires consisting of a non-magnetic inner core and soft magnetic shell is studied theoretically. It is assumed that the magnetic shell has a helical anisotropy. The current and field distributions in the composite wire are found by means of a simultaneous solution of Maxwell equations and the Landau-Lifshitz equation. The expressions for the diagonal and off-diagonal impedance are obtained for low and high frequencies. The dependences of the impedance on the anisotropy axis angle and the shell thickness are analyzed. Maximum field sensitivity is shown to correspond to the case of the circular anisotropy in the magnetic shell. It is demonstrated that the optimum shell thickness to obtain maximum impedance ratio is equal to the effective skin depth in the magnetic material. © 2005 Elsevier B.V. All rights reserved.
Source Title: Journal of Magnetism and Magnetic Materials
ISSN: 03048853
DOI: 10.1016/j.jmmm.2005.01.026
Appears in Collections:Staff Publications

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