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AbstractAbstract
[en] Giant magnetoimpedance (GMI) effect in NiFe (150 nm)/Cu (500 nm)/NiFe (150 nm) multilayers with longitudinal and transverse induced magnetic anisotropy was studied at frequencies of 300 kHz-3 GHz. Several sensitive elements were built in a single 'chip' configuration. At low and intermediate frequencies the GMI displays a single peak at zero-field for samples with longitudinal and two peaks for the samples with transverse anisotropy. Above 500 MHz the observed behaviour in both cases can be explained by the apparition of the ferromagnetic resonance (FMR). Regarding the performance of the sample, the maximum GMI sensitivity values achieved in case of longitunal anisotropy are 6%/Oe from the single peak to the saturation field at 500 MHz (quasistatic regime), and 12%/Oe from the FMR peaks to zero-field at 1.12 GHz (dynamic regime). Sensitivity values achieved in case of transverse anisotropy are 31%/Oe from the single peak to the saturation field at 70 MHz and 17%/Oe from the FMR peaks to zero-field at 0.8 GHz. Small variations of GMI ratio and field sensitivity for different sensitive elements built in a single 'chip' confirm the possibility to use this design for multi-analyte detector construction
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Source
18. international symposium on soft magnetic materials; Cardiff (United Kingdom); 2-5 Sep 2007; S0304-8853(08)00534-9; Available from http://dx.doi.org/10.1016/j.jmmm.2008.04.174; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Literature Type
Conference
Journal
Journal of Magnetism and Magnetic Materials; ISSN 0304-8853;
; CODEN JMMMDC; v. 320(20); p. e954-e957

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