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Title: Asymmetric giant magnetoresistance in Co10Cu90 magnetic granular alloys
Author: Yu, Ronghai
Zhang, Xixiang
Tejada Palacios, Javier
Zhu, Jie
Keywords: Metalls de transició
Propietats magnètiques
Transition metals
Magnetic properties
Issue Date: 1995
Publisher: The American Physical Society
Abstract: We have observed a type of giant magnetoresistance (GMR) in magnetic granular Co10Cu90 alloys. The asymmetric GMR depends strongly on the size of magnetic Co particles, which exhibit superparamagnetic behavior at given measured temperature. The asymmetric GMR points to a metastable state that develops when the sample is field-cooled, which is lost after recycling. We propose that high-field cooling produces more effective parallel alignment of small unblocked Co particle moments and interfacial magnetizations, which contributes to the further decrease of the resistance in comparison with the samples zero-field-cooled, and then applied to the same field.
Note: Reproduccio digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 1995, vol. 52, núm. 10, p. 6987-6990
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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