Investigation of Helimagnetism in Dy and Ho Thin Films by Neutron Reflectometry

被引：5
|
作者：
Devyaterikov, D. I. [1 ]
Kravtsov, E. A. [1 ,2 ]
Proglyado, V. V. [1 ]
Zhaketov, V. D. [3 ]
Nikitenko, Yu. V. [3 ]
机构：
[1] Russian Acad Sci, Ural Branch, Inst Met Phys, Ekaterinburg 620108, Russia
[2] Ural Fed Univ, Ekaterinburg 620002, Russia
[3] Joint Inst Nucl Res, Frank Lab Neutron Phys, Dubna 141980, Russia
来源：
JOURNAL OF SURFACE INVESTIGATION | 2021年 / 15卷 / 03期
基金：
俄罗斯基础研究基金会;
关键词：
rare-earth metals; dysprosium; holmium; neutron reflectometry; magnetic ordering; MAGNETIC PHASE-DIAGRAM; HOLMIUM;
D O I：
10.1134/S102745102103023X
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
In this paper, the results of investigating thin films of rare-earth helimagnetics (REMs) Dy and Ho by polarized neutron reflectometry are presented. It is shown that the growth by magnetron sputtering of rareearth structures on sapphire substrates with a buffer layer Nb [1 (1) over bar 02] Al2O3 parallel to[110]Nb parallel to[0001]R leads to complete relaxation of the Nb crystal lattices and the rare-earth film. It is found that some magnetic phase transitions typical of bulk Dy and Ho are not observed in 200 nm [0001]R thin films or are observed in a modified form. Differences between the Neel and Curie temperatures of thin REM films compared to bulk REMs are determined based on polarized-neutron-reflectometry data and measurements of the temperature dependence of the magnetization in the sample plane.
引用
收藏
页码：542 / 548
页数：7
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