Dresden 2020 – scientific programme
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MA: Fachverband Magnetismus
MA 57: Posters Magnetism II
MA 57.3: Poster
Thursday, March 19, 2020, 15:00–18:00, P3
Magnetocaloric effect in DyCo2 and Ho0.5Dy0.5Al2 rare-earth compounds — •E. Bykov1,2, T. Gottschall1, A. Karpenkov3, K. Skokov4, S. Taskaev5,6,7, Y. Skourski1, and J. Wosnitza1,2 — 1Dresden High Magnetic Field Laboratory (HLD-EMFL), HZDR, Germany — 2Institut für Festkörper- und Materialphysik, TU Dresden, Germany — 3Faculty of Physics, Tver State University, Russia — 4Institute of Material Science, TU Darmstadt, Germany — 5Departament of Physics, Chelyabinsk State University, Russia — 6National University of Science and Technology MISiS, Russia — 7National Research South Ural State University, Russia
Two of the most promising materials for magnetic gas liquefaction are the rare-earth compounds of the type RCo2 and RAl2, which have the so-called Laves phase crystal structure, in which the ferri- or ferromagnetic order appears at low temperatures [1]. In this work, we will present our recent results on the magnetocaloric effect of DyCo2 and Ho0.5Dy0.5Al2 in pulsed magnetic fields. Both compounds demonstrate large adiabatic temperature changes over a wide temperature window near their Curie temperatures (143 K for DyCo2 and 44 K for Ho0.5Dy0.5Al2). Especially the usage of Ho0.5Dy0.5Al2 is interesting for a final stage of H2 liquefaction in magnetic refrigerator devices. This work was supported by the Helmholtz Association via the Helmholtz-RSF Joint Research Group Project No. HRSF-0045.
[1] A. Kitanovski et. al, Int. J. Refrig. 57, 288 (2015)