Observation of a Fluctuation-Enhanced Magnetoresistance in Ni81Fe19 /Ag Multilayers at High Current Density
Charles T. Rogers, L S. Kirschenbaum, P D. Beale, Stephen E. Russek, S. Sanders
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 106 A/cm2. 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.
, Kirschenbaum, L.
, Beale, P.
, Russek, S.
and Sanders, S.
Observation of a Fluctuation-Enhanced Magnetoresistance in Ni81Fe19 /Ag Multilayers at High Current Density, Rapid Communications in Mass Spectrometry, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=905265
(Accessed February 23, 2024)