GdH0.15的磁相变：磁热效应和磁致伸缩效应的一些特性

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2022-04-28 DOI:10.1109/LMAG.2022.3171089

Galina A. Politova;Irina S. Tereshina;Evgenia A. Tereshina-Chitrova;Barbora Vondráčková;Jiří Pospíšil;Mikhail A. Paukov;Alexander V. Andreev

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引用次数: 0

摘要

研究了用改进的Czochralski方法生长的氢化Gd单晶在有序和无序磁相变中的磁热效应和磁致伸缩行为异常。使用Sievert型设备获得组合物GdH0.15。虽然母体Gd在有序-无序相变时表现出各向同性MCE，但由于局部各向异性的出现，GdH0.15中的效应是各向异性的。我们详细研究了纵向、横向、体积和各向异性磁致伸缩的温度变化。发现氢化同时影响磁致伸缩常数$\lambda_｛\rm-ij｝^｛\alpha｝$的大小和符号。

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Magnetic Phase Transitions in GdH0.15: Some Peculiarities in the Behavior of Magnetocaloric and Magnetostrictive Effects

The magnetocaloric effect (MCE) and anomalies of magnetostriction behavior were studied at the order-order and order-disorder magnetic phase transitions in hydrided Gd single crystal grown by a modified Czochralski method. The composition GdH _0.15 was obtained using a Sievert-type apparatus. While parent Gd shows an isotropic MCE at the order-disorder phase transition, the effect is anisotropic in GdH _0.15 due to the appearance of local anisotropy. We investigate in detail the temperature variation of the longitudinal, transverse, volume, and anisotropic magnetostriction. Hydrogenation is found to influence both the magnitude and the sign of the magnetostriction constants

$\lambda_{\rm ij}^{\alpha}$

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.