The Thermal-Magnetic Properties of Terbium Before and After Severe Plastic Deformation

被引：0
|
作者：
Korneeva, Yu. V. [1 ]
Chzhan, V. B. [1 ]
Tereshina, I. S. [1 ]
Kaminskaya, T. P. [1 ]
Burkhanov, G. S. [2 ]
机构：
[1] Moscow MV Lomonosov State Univ, Moscow 119991, Russia
[2] RAS, Baikov Inst Met & Mat Sci, Moscow 119334, Russia
来源：
MOSCOW UNIVERSITY PHYSICS BULLETIN | 2021年 / 76卷 / 02期
基金：
俄罗斯科学基金会;
关键词：
rare earth metals; terbium; magnetic phase transitions; severe plastic deformation; LATTICE-PARAMETERS; SINGLE-CRYSTAL; FIELDS;
D O I：
10.3103/S0027134921020053
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
This work presents an investigation of the structure, thermal and magneto-thermal properties of the rare earth metal terbium, which was purified and then underwent severe plastic deformation (SPD). The initial and deformed Tb samples contain nano-sized structural elements, which is confirmed by AFM scans. In high-purity Tb, the magnitude of the magnetocaloric effect (MCE) in the region of the transition to the paramagnetic state exceeds the MCE magnitude shown by Tb samples that have not been purified. It was found that the MCE practically disappears in the deformed sample. The magnetic properties of the samples in the paramagnetic region have been analyzed. It was found that severe plastic deformation makes it possible to obtain a material with new thermal and magneto-thermal properties, due to the transformation of the structure and exchange and magnetocrystalline interactions.
引用
收藏
页码：104 / 109
页数：6
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