GdH0.15的磁相变：磁热效应和磁致伸缩效应的一些特性

IF 1.1 4区物理与天体物理 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Magnetics Letters 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

IEEE Magnetics Letters PHYSICS, APPLIED-

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： IEEE Magnetics Letters is a peer-reviewed, archival journal covering the physics and engineering of magnetism, magnetic materials, applied magnetics, design and application of magnetic devices, bio-magnetics, magneto-electronics, and spin electronics. IEEE Magnetics Letters publishes short, scholarly articles of substantial current interest. IEEE Magnetics Letters is a hybrid Open Access (OA) journal. For a fee, authors have the option making their articles freely available to all, including non-subscribers. OA articles are identified as Open Access.