Magnetic properties and giant magnetoresistance in melt-spun Co-Cu alloys

R. H. Yu*, X. X. Zhang, J. Tejada, M. Knobel, P. Tiberto, P. Allia

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

Magnetic, structural, and transport properties of as-quenched and annealed Co10Cu90 samples have been investigated using x-ray diffraction and a SQUID magnetometer. The largest value of MR change was observed for the as-quenched sample annealed at 450°C for 30 min. The magnetic and transport properties closely correlate with the microstructure, mainly with Co magnetic particle size and its distribution. For thermal annealing the as-quenched samples below 600°C, the Co particle diameters increase from 4.0 to 6.0 nm with a magnetoresistance (MR) drop from 33.0% to 5.0% at 10 K. Comparison with the theory indicates that the interfacial electron spin-dependent scattering mechanism correlates with GMR for Co particle diameters up to about 6.0 nm.

Original languageEnglish (US)
Pages (from-to)392-397
Number of pages6
JournalJournal of Applied Physics
Volume78
Issue number1
DOIs
StatePublished - Dec 1 1995

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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