Multicaloric strategy to manipulate optimal operating temperature window: An experimental study on (Ni43Mn47Sn10)99.5Tb0.5 via a direct method

Abstract

Multicaloric effect refers to a thermal response of materials driven by multiple external fields. In this work, we explore the possibility by adopting multicaloric strategy to improve the transformation reversibility and manipulate the optimal operating temperature window in (Ni43Mn47Sn10)99.5Tb0.5 using a bespoke multicaloric effect characterization system. It is found that the reversibility of stress induced transformation could be significantly improved with the application of an extra magnetic field. More importantly, the operating temperature window of elastocaloric effect is shifted by ∼4 K to the lower temperature by applying a magnetic field of 4 T. Our experimental results reveal that such a dual-field multicaloric strategy is feasible and promising for improving the transformation reversibility and tuning the optimal operating temperature window for alloys with a magnetostructural transformation.