Berlin 2024 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 46: Poster II

MA 46.84: Poster

Donnerstag, 21. März 2024, 15:00–18:00, Poster C

On the magnetocaloric effect of terbium in high fields — •Tino Gottschall¹, Michael Kuz'min², Eduard Bykov¹, Deborah Schlagel³, Yaroslav Mudryk³, and J. Wosnitza¹ — ¹Helmholtz-Zentrum Dresden-Rossendorf — ²Aix-Marseille Université, France — ³Ames Laboratory, U.S. Department of Energy, USA

Magnetic cooling is a refrigeration technique that is based on the so-called magnetocaloric effect, the change of temperature caused by a magnetic field. It can be utilized to construct environmentally friendly cooling devices, air conditioners, and heat pumps. The element gadolinium plays a special role in this context, as it has an extraordinary large magnetocaloric effect at room temperature. In this presentation, however, we would like to focus on another rare-earth element, namely terbium. We show on a single crystal that it even outperforms gadolinium in terms of the adiabatic temperature change in high pulsed magnetic fields. Due to the extremely strong magnetic anisotropy, we have also observed an enormous rotational magnetocaloric effect, which could be interesting for the development of future magnetic-cooling devices.

Keywords: rare earth; magnetocaloric effect; adiabatic temperature change; magnetic anisotropy