Enhanced perpendicular magnetic anisotropy in chemically long-range ordered (0001)CoxPt1-x films

被引：44

作者：

Maret, M

Cadeville, MC

Herr, A

Poinsot, R

Beaurepaire, E

Lefebvre, S

Bessière, M

机构：

[1] ULP, Inst Phys & Chim Mat Strasbourg, Grp Etud Mat Met, CNRS,UMR 46, F-67037 Strasbourg, France

[2] CNRS, Utilisat Rayonnement Electromagnet Lab, CEA, MEN, F-91405 Orsay, France

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1999年 / 191卷 / 1-2期

关键词：

Co-Pt alloy films; structure; chemical order; magnetic anisotropy;

D O I：

10.1016/S0304-8853(98)00373-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Chemical long-range ordering along the growth direction has been observed in mostly HCP Co80Pt20 films grown on a Ru(0 0 0 1) buffer by the molecular beam epitaxy technique. Such ordering, strongly dependent on both the growth temperature and the crystalline quality of the alloy film, is revealed to enhance perpendicular magnetic anisotropy in HCP films. Pt segregation effect at the advancing surface, allowed by dominant surface diffusion, would be the driving force for promoting such uniaxial long-range ordering during the MBE process. Yet, ex situ annealing treatments performed at temperatures similar to the growth temperature have shown that the MBE-promoted chemical ordering, different from those found in the bulk L1(2)- or DO19-type ordered A(3)B compounds, is metastable in agreement with theoretical calculations. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：61 / 71

页数：11

共 21 条

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