Abstract

To bring magnetic refrigeration to market, superior magnetocaloric materials are still needed. In particular, it is important to tune alloy composition to promote abrupt, second-order magnetic phase transitions, for suitable cooling performance in a magnetic field that can vary as rapidly as 1000 T/s in a real device. Studying candidate quaternary alloys in very high pulsed magnetic fields, the authors find that magnetoelastic coupling determines the order of the transition, and that both candidates offer a large magnetocaloric response, which promises good performance under realistic conditions.

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