Formation of rhombohedral L11 CoPt thin film on glass and MgO(111) substrate

被引：11
|
作者：
Sun, An-Cheng [1 ]
Huang, S. H. [1 ]
Huang, Chuan-Fa [1 ]
机构：
[1] Yuan Ze Univ, Dept Chem Engn & Mat Sci, Chungli 32003, Taiwan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2013年 / 345卷
关键词：
L1(1); CoPt; Thin film; Magnetic property; Magnetocrystalline anisotropy; Sputter; PERPENDICULAR MAGNETIC-ANISOTROPY;
D O I：
10.1016/j.jmmm.2013.07.003
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
L1(1) type CoPt superstructure, a rhombohedral meta-stable phase, thin films with different thickness (t) were sputtered on glass, Pt/glass, and MgO(111) substrates. Perpendicular magnetic anisotropy (PMA) is obtained as the CoPt films, which are deposited on Pt(111)/glass and MgO substrates. The coercivity (H-c) of CoPt/Pt/glass is higher than that of CoPt/MgO(111) film due to the smaller lattice misfit at CoPt/Pt interface and domain wall impedance at CoPt grain boundary. For the CoPt/Pt/glass and CoPt/MgO films, H-c usually increases with reducing the t from 50 nm to 5 nm. This result could be attributed to the roughness effect at CoPt/Pt and CoPt/MgO interfaces. Without Pt underlayer, CoPt thin film exhibits soft magnetic phase on glass substrate. In this study, higher H-c of about 141 kA/m is shown on 3 nm-thick CoPt film on Pt/glass. The improvement of perpendicular magnetic properties are obtained by replacing the MgO(111) with Pt/glass, inducing high potential of L1(1) CoPt in future applications. Crown Copyright (c) 2013 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：282 / 287
页数：6
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