Perpendicular magnetic anisotropy and the magnetization process in CoFeB/Pd multilayer films

被引：33

作者：

Duc-The Ngo ^{[1
]}

Duy-Truong Quach ^{[2
]}

Quang-Hung Tran ^{[1
]}

Molhave, Kristian ^{[1
]}

The-Long Phan ^{[2
]}

Kim, Dong-Hyun ^{[2
]}

机构：

[1] Tech Univ Denmark, Dept Micro & Nanotechnol, DK-2800 Lyngby, Denmark

[2] Chungbuk Natl Univ, Dept Phys, Cheongju 361763, South Korea

来源：

JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2014年 / 47卷 / 44期

基金：

新加坡国家研究基金会;

关键词：

magnetic multilayer; perpendicular magnetic anisotropy; interfacial magnetism; magnetic domains and domain walls; magnetization reversal; DOMAIN-WALL MOTION; COFE/PD MULTILAYERS;

D O I：

10.1088/0022-3727/47/44/445001

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The perpendicular magnetic anisotropy (PMA) and dynamic magnetization-reversal process in [CoFeB t nm/Pd 1.0 nm](n)( t = 0.4, 0.6, 0.8, 1.0 and 1.2 nm; n = 2 - 20) multilayer films have been studied by means of magnetic hysteresis and Kerr effect measurements. Strong and controllable PMA with an effective uniaxial anisotropy up to 7.7 x 10(6) Jm(-3) and a saturation magnetization as low as 200 emu cm(-3) are achieved. The surface/interfacial anisotropy of the CoFeB/Pd interfaces-the main contribution to the PMA-is separated from the effective uniaxial anisotropy of the films and appears to increase with the number of CoFeB/Pd bilayers. Observation of the magnetic domains during a magnetization-reversal process, using polar magneto-optical Kerr microscopy, reveals the detailed behavior of the nucleation and displacement of the domain walls.

引用

页数：7

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