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TT: Fachverband Tiefe Temperaturen
TT 30: Caloric Effects in Ferromagnetic Materials (joint session MA/TT)
TT 30.1: Invited Talk
Tuesday, March 10, 2026, 09:30–10:00, POT/0151
Magnetic Cooling: From applications at room temperature to hydrogen liquefaction — •T. Gottschall1, E. Bykov1, M. Straßheim1, T. Platte2, C. Fujta2, D. Benke2, M. Fries2, W. Liu3, A. Döring3, K. Skokov3, O. Gutfleisch3, and J. Wosnitza1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2MAGNOTHERM Solutions GmbH, Darmstadt, Germany — 3Technical University of Darmstadt, Darmstadt, Germany
Magnetic cooling can be utilized to construct environmentally friendly cooling devices, air conditioners, and heat pumps. Recently, low temperatures became the focus of attention as an area of application for magnetocaloric cooling, namely for hydrogen liquefaction. The conventional liquefaction process uses up to 40 % of the lower heating value of the gas we are compressing, just to liquefy it! Magnetocaloric materials enable an alternative and more efficient approach. A large number of compounds are already known that show magnetocaloric effects in the desired temperature range and new candidates are constantly being added. In this work, we would like to discuss our current progress for the creation of a materials library for cryogenic applications. The basis for this is our characterization infrastructure for materials research at TU Darmstadt and the Dresden High Magnetic Field Laboratory in static and pulsed magnetic fields. Furthermore, we also provide an overview of the recent results in the demonstrator development of a magnetic hydrogen liquefier within the framework of the European project HyLICAL.
Keywords: Magnetocaloric; Hydrogen liqefaction; Magnetic cooling; Laves phases