Abstract

We report on the results of investigations of the optical and magnetooptical properties of Dy_xCo_{1 – x}/Bi/Py (Py is permalloy) trilayers. The temperature dependence of the magnetization has been examined using the magnetooptical Kerr effect and the optical refractive and absorption indices have been measured by spectral ellipsometry. It is shown that the thickness of the bismuth spacer affects the exchange coupling between the permalloy and DyCo layers, which manifests itself in the change in the magnetization compensation temperature and in the character of the exchange coupling.

中文翻译：

---

Dy x Co 1 – x / Bi / Py三层膜的光学和磁性

摘要

我们报告对Dy _x Co _{1 – x} / Bi / Py（Py是坡莫合金）三层光学和磁光性质的研究结果。使用磁光克尔效应检查了磁化强度的温度依赖性，并通过光谱椭圆偏振法测量了光学折射率和吸收指数。示出了铋间隔物的厚度影响坡莫合金层和DyCo层之间的交换耦合，这本身表现为磁化补偿温度的变化和交换耦合的特性。