Abstract

The role of size effects in the formation of the magnetic structure of Dy and Ho thin films in absence of epitaxial strain is studied in this work. It was found that, for Dy in the temperature range between the Néel temperature and the Curie temperature of bulk Dy and, for Ho, in the temperature range between the Néel temperature and the temperature of phase transition into the conic phase, the temperature dependences of the period of magnetic helicoid in the bulk and film metals are similar. The character of the transition into the ferromagnetic phase in the Dy films changes at lower temperatures, and the transition into the commensurable conic phase in the Ho films is suppressed. This is explained exclusively by the influence of dimensional effects.

中文翻译：

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尺寸效应对 Dy 和 Ho 薄膜居里温度的影响

摘要

在这项工作中研究了尺寸效应在没有外延应变的情况下形成 Dy 和 Ho 薄膜的磁性结构中的作用。发现，对于 Dy 在 Néel 温度和体 Dy 的居里温度之间的温度范围内，对于 Ho，在 Néel 温度和相变到圆锥相的温度之间的温度范围内，温度依赖性为块状金属和薄膜金属中的磁性螺旋周期相似。Dy 薄膜向铁磁相的转变特征在较低温度下发生变化，Ho 薄膜向可公度圆锥相的转变受到抑制。这完全可以通过尺寸效应的影响来解释。