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 p...

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Bibliographic Details
Published in:IEEE magnetics letters 2022, Vol.13, p.1-5
Main Authors: Politova, Galina A., Tereshina, Irina S., Tereshina-Chitrova, Evgenia A., Vondrackova, Barbora, Pospisil, Jiri, Paukov, Mikhail A., Andreev, Alexander V.
Format: Article
Language:English
Subjects:
Anisotropy
Anomalies
Crystal growth
Crystals
Czochralski method
Gadolinium
hydrogenation
Magnetic anisotropy
Magnetic field measurement
Magnetic fields
magnetic phase transition
magnetocaloric effect
Magnetostriction
Order disorder
Perpendicular magnetic anisotropy
Phase transitions
rare-earth metal
Single crystals
Soft magnetic materials
Temperature measurement
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Summary: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}.
ISSN:1949-307X
1949-3088
DOI:10.1109/LMAG.2022.3171089