Magnetic properties and giant magnetoresistance in magnetic granular coxcu100-x alloys

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

doi:10.1088/0022-3727/28/9/003

Magnetic properties and giant magnetoresistance in magnetic granular co_xcu_100-x alloys

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

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13 Scopus citations

Abstract

Magnetic granular CoxCuioo alloys (x - 5-20) have been prepared by melt-spinning and subsequently annealing at 450 °C for 30 min, which is most appropriate for obtaining the largest MR change with magnetic field in each sample. The highest magnetoresistance (MR) change of 42.5% was observed in annealed CoCuss ribbons. Based on the superparamagnetic assumption, the average size of Co particles embedded in a Cu-rich matrix for different samples, ranging from 3.5 to 5.5 nm, has been estimated by simulating the magnetization curves at room temperature which is higher than the blocking temperature TB for each sample. The value of MR change was found to strongly depend on the Co composition and annealing temperature.

Original language	English (US)
Pages (from-to)	1770-1777
Number of pages	8
Journal	Journal of Physics D: Applied Physics
Volume	28
Issue number	9
DOIs	https://doi.org/10.1088/0022-3727/28/9/003
State	Published - Sep 14 1995
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Acoustics and Ultrasonics
Surfaces, Coatings and Films

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10.1088/0022-3727/28/9/003

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title = "Magnetic properties and giant magnetoresistance in magnetic granular coxcu100-x alloys",

abstract = "Magnetic granular CoxCuioo alloys (x - 5-20) have been prepared by melt-spinning and subsequently annealing at 450 °C for 30 min, which is most appropriate for obtaining the largest MR change with magnetic field in each sample. The highest magnetoresistance (MR) change of 42.5% was observed in annealed CoCuss ribbons. Based on the superparamagnetic assumption, the average size of Co particles embedded in a Cu-rich matrix for different samples, ranging from 3.5 to 5.5 nm, has been estimated by simulating the magnetization curves at room temperature which is higher than the blocking temperature TB for each sample. The value of MR change was found to strongly depend on the Co composition and annealing temperature.",

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T1 - Magnetic properties and giant magnetoresistance in magnetic granular coxcu100-x alloys

AU - Yuj, R. H.

AU - Zhang, X. X.

AU - Tejada, J.

AU - Knobel, M.

AU - Tiberto, P.

AU - Allia, P.

PY - 1995/9/14

Y1 - 1995/9/14

N2 - Magnetic granular CoxCuioo alloys (x - 5-20) have been prepared by melt-spinning and subsequently annealing at 450 °C for 30 min, which is most appropriate for obtaining the largest MR change with magnetic field in each sample. The highest magnetoresistance (MR) change of 42.5% was observed in annealed CoCuss ribbons. Based on the superparamagnetic assumption, the average size of Co particles embedded in a Cu-rich matrix for different samples, ranging from 3.5 to 5.5 nm, has been estimated by simulating the magnetization curves at room temperature which is higher than the blocking temperature TB for each sample. The value of MR change was found to strongly depend on the Co composition and annealing temperature.

AB - Magnetic granular CoxCuioo alloys (x - 5-20) have been prepared by melt-spinning and subsequently annealing at 450 °C for 30 min, which is most appropriate for obtaining the largest MR change with magnetic field in each sample. The highest magnetoresistance (MR) change of 42.5% was observed in annealed CoCuss ribbons. Based on the superparamagnetic assumption, the average size of Co particles embedded in a Cu-rich matrix for different samples, ranging from 3.5 to 5.5 nm, has been estimated by simulating the magnetization curves at room temperature which is higher than the blocking temperature TB for each sample. The value of MR change was found to strongly depend on the Co composition and annealing temperature.

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Magnetic properties and giant magnetoresistance in magnetic granular co_xcu_100-x alloys

Abstract

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