Correlation between the structure and thermomagnetic properties of pseudo-binary (Tb,Er)Ni.sub.2./sub. solid solutions

0553360 - FZÚ 2022 RIV NL eng J - Journal Article
Ćwik, J. - Koshkid'ko, Y. - Nenkov, K. - Tereshina-Chitrova, Evgenia - Kolchugina, N.
Correlation between the structure and thermomagnetic properties of pseudo-binary (Tb,Er)Ni₂ solid solutions.
Journal of Alloys and Compounds. Roč. 859, Apr. (2021), č. článku 157870. ISSN 0925-8388. E-ISSN 1873-4669
Institutional support: RVO:68378271
Keywords : intermetallic compounds * magnetic materials * phase transition * magnetocaloric effect * Laves phase * magnetic entropy change
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 6.371, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.jallcom.2020.157870

Magnetic and thermodynamic properties of the polycrystalline pseudo-binary Tb1-xErxNi2 (x = 0.25, 0.5, and 0.75) solid solutions are studied in accordance with the erbium substitution for terbium, which causes changing of the crystal structure. The Tb1-xErxNi2 solid solutions at room temperature were found to have the C15 Laves-phase superstructure rather than the C15 structure typical of the parent compounds, TbNi2 and ErNi2. The substitution of Er for Tb in Tb1-xErxNi2 decreases the ordering temperature, which corresponds to the second-order ferromagnet to paramagnet magnetic phase transition. The maximum magnetic entropy change of the Tb0·75Er0·25Ni2, Tb0·5Er0·5Ni2 and for Tb0·25Er0·75Ni2 compositions reaches 6.6 (12.7), 6.9 (13.8) and 7.5 (14.9) J/kgK for a magnetic field change of 2 (5) T, respectively. These pseudo-binary solid solutions show promise as materials for magnetic refrigerators operating within a specific low-temperature range.
Permanent Link: http://hdl.handle.net/11104/0328325