Abstract

The structure of a material promising for magnetic memory elements based on Fe/Pd/Gd/Pd superlattices has been investigated by X-ray analysis and electron microscopy. Microstructural transformations in the superlattices and the influence of microstructure modification on the magnetic properties of the system are determined. It is shown that intense diffusion of Pd atoms to Gd layers occurs in the superlattices under study. The presence of a paramagnetic Pd layer changes the character of exchange interaction between neighboring ferromagnetic layers due to the induced magnetic moment on Pd atoms near the interface because of the interface imperfection. Nanocrystalline inclusions are found in the Pd/Gd/Pd layers, which are suggested to affect the specificity of magnetic ordering in these systems, as confirmed by magnetic measurements.

中文翻译：

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周期性Fe / Pd / Gd / Pd多层体系的结构特征分析

摘要

通过X射线分析和电子显微镜研究了有望用于基于Fe / Pd / Gd / Pd超晶格的磁存储元件的材料的结构。确定了超晶格中的微结构转变以及微结构改性对系统磁性能的影响。结果表明，在研究的超晶格中Pd原子向Gd层的强烈扩散。由于界面缺陷，顺磁性Pd层的存在改变了界面附近Pd原子上的感应磁矩，从而改变了相邻铁磁性层之间的交换相互作用的特性。磁性测量结果证实，在Pd / Gd / Pd层中发现了纳米晶体夹杂物，提示它们会影响这些系统中磁性有序性的特异性。