Títol:
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Asymmetric giant magnetoresistance in Co10Cu90 magnetic granular alloys
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Autor/a:
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Yu, Ronghai; Zhang, Xixiang; Tejada Palacios, Javier; Zhu, Jie
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Altres autors:
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Universitat de Barcelona |
Abstract:
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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. |
Matèries:
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-Metalls de transició -Propietats magnètiques -Reologia -Transition metals -Magnetic properties -Rheology |
Drets:
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(c) The American Physical Society, 1995
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Tipus de document:
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Article Article - Versió publicada |
Publicat per:
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The American Physical Society
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Compartir:
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