Magnetic and magnetotransport properties in Co5Cu95 melt-spun 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

5 Scopus citations

Abstract

Giant magnetoresistance (GMR) has been observed in Co5Cu95 alloys fabricated by melt-spinning. The highest MR change of 28.0% occurs for Co5Cu95 after annealing at 450°C for 30 min. Based on the super-paramagnetic assumption, the average size of Co particles embedded in Cu matrix, ranging from 3.0 to 6.0 nm, has been determined by simulating the magnetization curves at 295 K which is higher than the blocking temperatures for the samples. Comparison with phenomenological theory for GMR indicates that the interfacial spin-dependent scattering is the dominant scattering mechanism underlying GMR origin in granular systems. Additionally, for the samples in as-quenched state or annealed at temperature TA=350°C, the electron hybridization and super-paramagnetic behaviors of fine Co particles may be responsible for the low value of MR change.

Original languageEnglish (US)
Pages (from-to)447-451
Number of pages5
JournalZeitschrift für Physik B Condensed Matter
Volume98
Issue number4
DOIs
StatePublished - Dec 1995
Externally publishedYes

Keywords

  • 72.15.G
  • 75.60.E
  • 78.70.D,E
  • 83.70.F

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

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