Correlation between giant magnetoresistance and magnetic interactions in a CoAg multilayered/granular system

A. D. C. Viegas, J. Geshev, L. F. Schelp, J. E. Schmidt
1997 Journal of Applied Physics  
Magnetizing, demagnetizing, and remanent magnetization curves for ͓Co͑12 Å͒/Ag͑60 Å͔͒ϫ15 multilayered/granular films thermally treated have been measured. The changes of the giant magnetoresistance and the interaction effects have been explained as a result of the structural, morphological, and magnetic evolution of the samples as a function of the thermal treatment. It has been inferred that for samples annealed at temperatures lower than 360°C, the changes of the giant magnetoresistance come
more » ... etoresistance come from the misalignment of the magnetic moments of the Co particles formed during annealing. A strong correlation between the giant magnetoresistance and the magnetic interaction effects has been found for samples annealed at temperatures higher than 360°C: the giant magnetoresistance is degraded as the demagnetizing interparticle interactions are increased.
doi:10.1063/1.366058 fatcat:w4iq3buh55hijjdm4oqrqbk3wu