Magnetic properties and giant magnetoresistance in melt-spun Co 15Cu85 alloys

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

doi:10.1088/0953-8984/7/21/008

Magnetic properties and giant magnetoresistance in melt-spun Co ₁₅Cu₈₅ alloys

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

The structure, magnetic properties and giant magnetoresistance (GMR) of a metallic granular Co₁₅Cu₈₅ alloy have been investigated using an X-ray diffractometer and a SQUID magnetometer. The granular samples were fabricated by melt spinning and subsequently thermal annealing. Structural characterization confirmed that the samples consist of ultrafine Co magnetic particles embedded in the non-magnetic Cu matrix. Above the blocking temperature T_B, the magnetic behaviour of Co particles can be understood on the basis of paramagnetic theory. The largest change in magnetoresistance of 43.0% was observed for the as-quenched ribbon annealed at 450 degrees C. It was confirmed that the GMR is closely correlated with the Co particle size and density, which can be optimized by controlling the annealing conditions.

Original language	English (US)
Article number	008
Pages (from-to)	4081-4093
Number of pages	13
Journal	Journal of Physics: Condensed Matter
Volume	7
Issue number	21
DOIs	https://doi.org/10.1088/0953-8984/7/21/008
State	Published - 1995
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

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title = "Magnetic properties and giant magnetoresistance in melt-spun Co 15Cu85 alloys",

abstract = "The structure, magnetic properties and giant magnetoresistance (GMR) of a metallic granular Co15Cu85 alloy have been investigated using an X-ray diffractometer and a SQUID magnetometer. The granular samples were fabricated by melt spinning and subsequently thermal annealing. Structural characterization confirmed that the samples consist of ultrafine Co magnetic particles embedded in the non-magnetic Cu matrix. Above the blocking temperature TB, the magnetic behaviour of Co particles can be understood on the basis of paramagnetic theory. The largest change in magnetoresistance of 43.0% was observed for the as-quenched ribbon annealed at 450 degrees C. It was confirmed that the GMR is closely correlated with the Co particle size and density, which can be optimized by controlling the annealing conditions.",

author = "Yu, {R. H.} and Zhang, {X. X.} and J. Tejada and M. Knobel and P. Tiberto and P. Allia",

year = "1995",

doi = "10.1088/0953-8984/7/21/008",

language = "English (US)",

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T1 - Magnetic properties and giant magnetoresistance in melt-spun Co 15Cu85 alloys

AU - Yu, R. H.

AU - Zhang, X. X.

AU - Tejada, J.

AU - Knobel, M.

AU - Tiberto, P.

AU - Allia, P.

PY - 1995

Y1 - 1995

N2 - The structure, magnetic properties and giant magnetoresistance (GMR) of a metallic granular Co15Cu85 alloy have been investigated using an X-ray diffractometer and a SQUID magnetometer. The granular samples were fabricated by melt spinning and subsequently thermal annealing. Structural characterization confirmed that the samples consist of ultrafine Co magnetic particles embedded in the non-magnetic Cu matrix. Above the blocking temperature TB, the magnetic behaviour of Co particles can be understood on the basis of paramagnetic theory. The largest change in magnetoresistance of 43.0% was observed for the as-quenched ribbon annealed at 450 degrees C. It was confirmed that the GMR is closely correlated with the Co particle size and density, which can be optimized by controlling the annealing conditions.

AB - The structure, magnetic properties and giant magnetoresistance (GMR) of a metallic granular Co15Cu85 alloy have been investigated using an X-ray diffractometer and a SQUID magnetometer. The granular samples were fabricated by melt spinning and subsequently thermal annealing. Structural characterization confirmed that the samples consist of ultrafine Co magnetic particles embedded in the non-magnetic Cu matrix. Above the blocking temperature TB, the magnetic behaviour of Co particles can be understood on the basis of paramagnetic theory. The largest change in magnetoresistance of 43.0% was observed for the as-quenched ribbon annealed at 450 degrees C. It was confirmed that the GMR is closely correlated with the Co particle size and density, which can be optimized by controlling the annealing conditions.

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DO - 10.1088/0953-8984/7/21/008

M3 - Article

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SN - 0953-8984

VL - 7

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JO - Journal of Physics: Condensed Matter

JF - Journal of Physics: Condensed Matter

IS - 21

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ER -

Magnetic properties and giant magnetoresistance in melt-spun Co ₁₅Cu₈₅ alloys

Abstract

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