STRESS-INDUCED ASYMMETRIC MAGNETOIMPEDANCE EFFECT IN Ni80Fe20/Cu COMPOSITE WIRES

Wenxing Lv, Xin Li, Wenhui Xie, Qiang Zhao and Zhenjie Zhao
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Wenxing Lv: Engineering Research Center for Nanophotonics and Advanced Instrument, School of Physics and Materials Science, East China Normal University, 3663 N. Zhongshan Rd., Shanghai 200062, P. R. China
Xin Li: Engineering Research Center for Nanophotonics and Advanced Instrument, School of Physics and Materials Science, East China Normal University, 3663 N. Zhongshan Rd., Shanghai 200062, P. R. China
Wenhui Xie: Engineering Research Center for Nanophotonics and Advanced Instrument, School of Physics and Materials Science, East China Normal University, 3663 N. Zhongshan Rd., Shanghai 200062, P. R. China
Qiang Zhao: Engineering Research Center for Nanophotonics and Advanced Instrument, School of Physics and Materials Science, East China Normal University, 3663 N. Zhongshan Rd., Shanghai 200062, P. R. China
Zhenjie Zhao: Engineering Research Center for Nanophotonics and Advanced Instrument, School of Physics and Materials Science, East China Normal University, 3663 N. Zhongshan Rd., Shanghai 200062, P. R. China

Surface Review and Letters (SRL), 2017, vol. 24, issue 08, 1-6

Abstract: The magnetoimpedance effect of Ni80Fe20/Cu composited wires was experimentally investigated by varying the Ni80Fe20 coating thickness. An asymmetric MI behavior with a tunable linear region around zero magnetic field by altering the thickness of Ni80Fe20 layer was demonstrated. And the MI behavior was governed by the different anisotropy induced by the residual local stress in the multi-layer region. In addition, our investigation also suggested that the interactions between interface phase and outer phase of coating layer decreased with thickness, resulting in the domination of the asymmetric MI characteristic. For thickness of 485nm, the sensitivity was up to 225%/Oe from −2 Oe to 2 Oe, providing a promising candidate for linear sensor application.

Keywords: Asymmetric magnetoimpedance; residual local stress; anisotropy; interactions; linear sensor (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X17501098

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