Chemical long-range ordering in a CoPt alloy film grown by molecular beam epitaxy

被引：10

作者：

Grange, W

Ulhaq-Bouillet, C

Maret, M

Thibault, J

机构：

[1] Inst Phys & Chim Mat Strasbourg, F-67037 Strasbourg, France

[2] CEA, Dept Rech Fondamentale Mat Condensee, F-38054 Grenoble, France

来源：

ACTA MATERIALIA | 2001年 / 49卷 / 08期

关键词：

molecular beam epitaxy (MBE); transmission electron microscopy (TEM); X-ray diffraction (XRD); alloys; thin films;

D O I：

10.1016/S1359-6454(01)00035-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The chemical long-range ordering in a CoPt alloy film, grown at 800K onto a MgO (001) substrate by molecular beam epitaxy, has been investigated using both X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM). From HRTEM, we found that this him exhibits a Ll(0)-type order, characterised by a stacking of almost pure cobalt and pure platinum planes along the tetragonal axis parallel to the growth direction. The value of the long-range order parameter deduced from XRD, significantly smaller than 1, is attributed to the existence of antiphase boundaries along the [001] direction. (C) 2001 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.

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页码：1439 / 1444

页数：6

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