Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/52939
Type: Artigo de periódico
Title: MAGNETIC-PROPERTIES AND GIANT MAGNETORESISTANCE OF MAGNETIC GRANULAR CO10CU90 ALLOYS OBTAINED BY DIRECT-CURRENT JOULE HEATING
Author: YU, RH
ZHANG, XX
TEJADA, J
ZHU, J
KNOBEL, M
TIBERTO, P
ALLIA, P
VINAI, F
Abstract: The direct-current (de) joule heating technique was exploited to fabricate giant magnetoresistance (GEAR) 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 de 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 de joule-heated samples. (C) 1995 American Institute of Physics.
Country: EUA
Editor: Amer Inst Physics
Rights: aberto
Identifier DOI: 10.1063/1.359735
Date Issue: 1995
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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