The influence of small hydrogen addition on the structural and magnetocaloric properties of high-purity nanocrystalline terbium

0553357 - FZÚ 2022 RIV US eng J - Journal Article
Korneeva, Yu.V. - Chzhan, V.B. - Tereshina, I. S. - Kaminskaya, T.P. - Tereshina-Chitrova, Evgenia - Drulis, H. - Rogacki, K.
The influence of small hydrogen addition on the structural and magnetocaloric properties of high-purity nanocrystalline terbium.
International Journal of Hydrogen Energy. Roč. 46, č. 27 (2021), s. 14556-14564. ISSN 0360-3199. E-ISSN 1879-3487
R&D Projects: GA MŠMT(CZ) LM2018096
Institutional support: RVO:68378271
Keywords : hydrogen-containing media * high-purity nanocrystalline terbium * magnetocaloric effect
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 7.139, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.ijhydene.2021.01.228

Hydrogen absorption often induces changes of various properties of rare-earth metals. In this paper, we study the influence of hydrogenation on the structural, magnetic and magnetocaloric properties of high-purity nanocrystalline terbium. Strong (00l) texture present in the parent Tb sample is practically destroyed after the hydrogenation procedure. We observe formation of agglomerates of different sizes and shapes depending on the hydrogen content in the samples. We find traces of β-hydride (TbH2) in the main α-hydride TbHx phase. For TbHx with x = 0.25 and 0.5 at.H/f The effect of hydrogenation on the magnetocaloric properties is studied in magnetic fields up to 9 T. The magnetocaloric effect decreases after hydrogenation. The -ΔSM(T) curves feature a table-like effect in the vicinity of the magnetic phase transitions in magnetic fields exceeding 1 T.
Permanent Link: http://hdl.handle.net/11104/0328323