Issue |
EPL
Volume 101, Number 1, January 2013
|
|
---|---|---|
Article Number | 17005 | |
Number of page(s) | 4 | |
Section | Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties | |
DOI | https://doi.org/10.1209/0295-5075/101/17005 | |
Published online | 21 January 2013 |
Phenomenological theory of the giant magnetoimpedance of composite wires
1 Institute of Experimental Physics, Saarland University - P.O. Box 151150, D-66041 Saarbruecken, Germany, EU
2 Department of Physics, East China Normal University - 3663 Zhongshan North Road, 200062 Shanghai, PRC
(a) h.gao@mx.uni-saarland.de
(b) zjzhao@phy.ecnu.edu.cn
Received: 25 October 2012
Accepted: 18 December 2012
Composite wires with a three-layered structure are known to show a particularly large magnetoimpedance effect. The wires consist of a highly conductive core, an insulating layer and an outer ferromagnetic shell. In order to understand the origin of the effect, a theory based on a coupling of the Maxwell equations to the Landau-Lifschitz-Gilbert equation is suggested. The theory is phenomenological in the sense that it does not account for a domain structure. However, theoretical results nicely reproduce those obtained in various measurements. Furthermore, an upper limit of the magnetoimpedance ratio for a given combination of materials can be determined.
PACS: 75.47.-m – Magnetotransport phenomena; materials for magnetotransport / 75.70.-i – Magnetic properties of thin films, surfaces, and interfaces / 75.20.En – Metals and alloys
© EPLA, 2013
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