CoPt nanoparticles deposited by electron beam evaporation

被引：26

作者：

Castaldi, L

Giannakopoulos, K

Travlos, A

Niarchos, D

Boukari, S

Beaurepaire, E

机构：

[1] NCSR Demokritos, IMS, Athens 15310, Greece

[2] CNRS ULP, UMR 7504, IPCMS, F-67034 Strasbourg, France

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2005年 / 290卷

关键词：

nanoparticles; hard magnetic materials; deposition; magnetic recording media;

D O I：

10.1016/j.jmmm.2004.11.523

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Co50Pt50 nanoparticles were co-deposited on thermally oxidized Si substrates by electron beam evaporation at 750 degrees C. The mean particle sizes are between similar to 5 and similar to 20 nm and depend on the nominal thickness of the layer. Different processing conditions resulted in different structural and morphological properties of the samples which led to superparamagnetic and ferromagnetic behaviors. The post-annealing treatment of the CoPt nanograins resulted in the crystallization of the L1(0) ordered phase and in the magnetic hardening of nanoparticles with a maximum coercivity of similar to 7.4 kOe. (c) 2004 Elsevier B.V. All rights reserved.

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页码：544 / 546

页数：3

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