OBSERVATION OF A FLUCTUATION-ENHANCED MAGNETORESISTANCE IN NI81F19 AGMULTILAYERS AT HIGH-CURRENT DENSITY/

Authors
ROGERS CT KIRSCHENBAUM LS BEALE PD RUSSEK SE SANDERS SC
Citation
Ct. Rogers et al., OBSERVATION OF A FLUCTUATION-ENHANCED MAGNETORESISTANCE IN NI81F19 AGMULTILAYERS AT HIGH-CURRENT DENSITY/, Physical review. B, Condensed matter, 56(14), 1997, pp. 8503-8506
Citations number
21
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
56
Issue
14
Year of publication
1997
Pages
8503 - 8506
Database
ISI
SICI code
0163-1829(1997)56:14<8503:OOAFMI>2.0.ZU;2-1
Abstract
We report a correlation between peaks observed in the resistance versu s applied magnetic field and low-frequency resistance noise for Ni81Fe 19/Ag giant magnetoresistance systems with de bias current density abo ve 10(6) A/cm(2). The magnetic noise has a 1/f-like spectrum and arise s from time-dependent magnetic orientational fluctuations within the m ultilayer. The noise amplitude is strongly correlated with the observe d magnetoresistance peaks. The data and a simple model for the fluctua tions demonstrate the important role of fluctuations in determining ma gnetoresistance in such multilayer systems.