Magnetic properties and giant magnetoresistance of magnetic granular Co10Cu90 alloys obtained by direct-current joule heating
- 15 October 1995
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 78 (8) , 5062-5066
- https://doi.org/10.1063/1.359735
Abstract
The direct-current (dc) joule heating technique was exploited to fabricate giant magnetoresistance (GMR) Co10Cu90 granular alloys. The Co cluster precipitation process was investigated by calorimetric and x-ray diffraction measurements. At T=10 K, the largest MR change of 25.0% has been observed for the melt-spun Co10Cu90 ribbon annealed at I=5 A. The magnetoresistance scales approximately as the inverse Co particle size. At room temperature, it was found that the dc joule-heated samples show relatively high GMR in comparison with furnace-annealed samples. Based on the phenomenological GMR model, we assumed that it is a consequence of smaller Co particles formed in dc joule-heated samples.This publication has 21 references indexed in Scilit:
- Giant magnetoresistance and Co-cluster structure in phase-separated Co-Cu granular alloysPhysical Review B, 1993
- Conductivity and magnetoresistance in magnetic granular films (invited)Journal of Applied Physics, 1993
- Giant magnetoresistance in melt spun Cu-Co alloysApplied Physics Letters, 1993
- Giant magnetoresistance in magnetically inhomogeneous thin filmsApplied Physics Letters, 1992
- Giant magnetoresistance in heterogeneous AgCo alloy filmsApplied Physics Letters, 1992
- Extraordinary Hall effect and giant magnetoresistance in the granular Co-Ag systemPhysical Review Letters, 1992
- Magnetic properties and giant magnetoresistance of granular permalloy in silverApplied Physics Letters, 1992
- Theory of giant magnetoresistance in magnetic granular filmsApplied Physics Letters, 1992
- Giant magnetoresistance in nonmultilayer magnetic systemsPhysical Review Letters, 1992
- Giant magnetoresistance in heterogeneous Cu-Co alloysPhysical Review Letters, 1992