Interface magnetic anisotropy in cobalt clusters embedded in a platinum matrix

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:237

Article

Jamet, M ; Négrier, M ; Dupuis, V ; Tuaillon-Combes, J ; Mélinon, P ; Pérez, A ; Wernsdorfer, W ; Barbara, B ; Baguenard, B

关键词: magnetic nanoclusters;    surface anisotropy;    interface effects;   

DOI  :  10.1016/S0304-8853(01)00695-3

来源: Elsevier

【 摘 要 】

Noninteracting cobalt clusters containing almost one thousand atoms are embedded in a platinum matrix using a codeposition technique. This one allows us to prepare nanostructured films from miscible elements such as Co/Pt. Deposited clusters keep a pure cobalt core surrounded with an alloyed CoPt interface. Magnetic measurements performed on this cluster assembly reveal a very strong interface anisotropy. Moreover, we find that a simple core-shell model can account for the observed anomalous temperature dependence of the cluster magnetization. (C) 2001 Elsevier Science B.V. All rights reserved.

【 授权许可】

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