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Low-temperature magnetothermodynamics performance of Tb.sub.1-x./sub.Er.sub.x./sub.Ni.sub.2./sub. laves-phases compounds for designing composite refrigerants
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SYSNO ASEP 0566432 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Low-temperature magnetothermodynamics performance of Tb1-xErxNi2 laves-phases compounds for designing composite refrigerants Author(s) Ćwik, J. (PL)
Koshkid'ko, Y. (PL)
Nenkov, K. (DE)
Tereshina-Chitrova, Evgenia (FZU-D) ORCID
Weise, B. (DE)
Kowalska, K. (PL)Number of authors 6 Article number 931 Source Title Crystals. - : MDPI - ISSN 2073-4352
Roč. 12, č. 7 (2022)Number of pages 11 s. Language eng - English Country CH - Switzerland Keywords intermetallic compounds ; laves phase ; magnetic entropy change ; magnetic materials ; magnetocaloric effect ; phase transition Subject RIV BF - Elementary Particles and High Energy Physics OECD category Condensed matter physics (including formerly solid state physics, supercond.) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000833741800001 EID SCOPUS 85133525435 DOI 10.3390/cryst12070931 Annotation Heat capacity measurements are performed on the polycrystalline Tb1-xErxNi2 intermetallic compounds with x = 0.25, 0.5 and 0.75. The Debye temperatures and lattice contributions as well as the magnetic part of the heat capacity were determined and analyzed. We find that the substitution of Tb atoms for Er atoms leads to a linear reduction of the Curie temperatures from 28.3 K in Tb0.25Er0.75Ni2 to 12.9 K in Tb0.75Er0.25Ni2. We calculate with good approximation the isothermal magnetic entropy ∆Smag and adiabatic temperature changes ∆Tad for Tb1-xErxNi2, for the magnetic field value equal to 1 T and 2 T. The optimal molar ratios of individual Tb0.75Er0.25Ni2, Tb0.5Er0.5Ni2 and Tb0.25Er0.75Ni2 components in the final composite were theoretically determined. According to the obtained results, the investigated composites make promising candidates that can find their application as an active body in a magnetic refrigerator performing an Ericsson cycle at low temperatures. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2023 Electronic address https://hdl.handle.net/11104/0337756
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