Magnetic properties and giant magnetoresistance of magnetic granular Co10Cu90 alloys obtained by direct-current joule heating

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

doi:10.1063/1.359735

Magnetic properties and giant magnetoresistance of magnetic granular Co₁₀Cu₉₀ alloys obtained by direct-current joule heating

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

^*Corresponding author for this work

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

18 Scopus citations

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.

Original language	English (US)
Pages (from-to)	5062-5066
Number of pages	5
Journal	Journal of Applied Physics
Volume	78
Issue number	8
DOIs	https://doi.org/10.1063/1.359735
State	Published - 1995
Externally published	Yes

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Magnetic properties and giant magnetoresistance of magnetic granular Co10Cu90 alloys obtained by direct-current joule heating",

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.",

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

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T1 - Magnetic properties and giant magnetoresistance of magnetic granular Co10Cu90 alloys obtained by direct-current joule heating

AU - Yu, R. H.

AU - Zhang, X. X.

AU - Tejada, J.

AU - Zhu, J.

AU - Knobel, M.

AU - Tiberto, P.

AU - Allia, P.

AU - Vinai, F.

PY - 1995

Y1 - 1995

N2 - 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.

AB - 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.

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DO - 10.1063/1.359735

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JF - Journal of Applied Physics

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Magnetic properties and giant magnetoresistance of magnetic granular Co₁₀Cu₉₀ alloys obtained by direct-current joule heating

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