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Publication Citation: Observation of a fluctuation-enhanced magnetoresistance in Ni81Fe19 /Ag multilayers at high current density

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Author(s): Stephen E. Russek; C. T. Rogers; L S. Kirschenbaum; P D. Beale; Steven C. Sanders;
Title: Observation of a fluctuation-enhanced magnetoresistance in Ni81Fe19 /Ag multilayers at high current density
Published: October 01, 1997
Abstract: We report a correlation between peaks observed in the resistance versus applied magnetic field and low frequency resistance noise for Ni81Fe19/Ag giant magnetoresistance systems with dc bias current density above 10^6 A/cm^2. The magnetic noise has a 1/f -like spectrum and arises from time-dependent magnetic orientational fluctuations within the multilayer. The noise amplitude is strongly correlated with the observed magnetoresistance peaks. The data and a simple model for the fluctuations demonstrate the important role of fluctuations in determining magnetoresistance in such multilayer systems.
Citation: Physical Review B
Volume: 56
Issue: 14
Pages: pp. R8503 - R8506
Research Areas: Electromagnetics
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