Exchange-spring behavior in epitaxial hard/soft magnetic bilayer films

被引：37

作者：

Jiang, JS ^{[1
]}

Fullerton, EE ^{[1
]}

Grimsditch, M ^{[1
]}

Sowers, CH ^{[1
]}

Bader, SD ^{[1
]}

机构：

[1] Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

JOURNAL OF APPLIED PHYSICS | 1998年 / 83卷 / 11期

关键词：

D O I：

10.1063/1.367769

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present results on the magnetic reversal process in epitaxial Sm-Co(1 (1) over bar 00)/TM (TM=Fe, Co) bilayer films prepared via magnetron sputtering onto Cr-buffered single-crystal MgO substrates. The magnetically hard Sm-Co films have 20 T uniaxial anisotropy and coercivities >3 T at room temperature. The magnetization of the soft layer is pinned at the interface to the hard-magnet layer and switches reversibly as expected for an exchange-spring magnet. With increasing soft layer thickness, the coercive field of the hard layer becomes significantly less than that of a single layer. We also present numerical solutions to a one-dimensional model that provide the spin configuration for each atomic layer. Comparison of the experimental results with the model simulations indicates that the exchange-spring behavior of our bilayer films can be understood from the intrinsic parameters of the hard and soft layers. (C) 1998 American Institute of Physics. [S0021-8979(98)42611-2].

引用

页码：6238 / 6240

页数：3

共 16 条

[11] NUCLEATION FIELDS AND GRAIN-BOUNDARIES IN HARD MAGNETIC-MATERIALS [J].