Abstract
In typical shape memory alloys, significant elastocaloric effects appear in association with stress-induced martensitic transformations. However, we report here that in an Fe-31.2Pd (at.%) alloy, a significant elastocaloric effect appears due to lattice softening, which causes a weak first-order martensitic transformation at T0 (∼230K). We found that in a wide temperature range of between 175K (<T0) and 335K (>T0), the alloy exhibits an adiabatic temperature decrease of more than 1.5K when a compressive stress of 200MPa applied in the [001] direction is removed. The refrigeration capacity calculated in this temperature range is 5MJ/m3.
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