Abstract
AbstractMagnetic refrigeration based on magnetocaloric effect (MCE) has become a promisingly alternative technology to the conventional vapor‐compression refrigeration. A great number of magnetic materials have been reported to exhibit larger MCE than that of the benchmark magnetic refrigerant Gd. However, these materials still have severe shortcomings on the “Non‐MCE” properties, such as hard preparation and fabrication, low thermal conductivity λ, and poor corrosion resistance and cycling stabilities, which hinder the practical application of these materials. In this paper, a novel La(Fe, Si)13Hy/In composite which is prepared by a readily available hot pressing method is demonstrated to exhibit an outstanding comprehensive performance with durable service life in various aspects. Noteworthily, the ΔSM does not decrease but increases with increasing nonmagnetic In metal. This advantageous anomaly is related to the strengthening of the first‐order itinerant electron metamagnetic transition induced by residual compression stress and surrounded constraints in the composite. The present results make La(Fe, Si)13Hy/In composite the most attractive alternative to Gd for magnetic refrigeration. Moreover, this work also provides a feasible way to solve the serious issues toward applications for La(Fe, Si)13‐based materials and other brittle magnetocaloric materials.
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