Abstract
In the present work, a low-pressure-induced large reversible barocaloric effect was achieved in (MnNiGe)0.91-(FeCoGe)0.09 alloys. The isothermal entropy change and the adiabatic temperature change are as high as 32.8 J·kg−1K−1 and 5.2 K by applying hydrostatic pressure of 1 kbar, respectively. The reversible isothermal entropy change of 19.3 J·kg−1K−1 and reversible adiabatic temperature change of 3.6 K within a temperature span of 16 K at 1 kbar have been achieved. Good reversible barocaloric performance is attributed to the combination of the thermal hysteresis of 6.4 K and the transition temperature shift with the pressure of 6.9 K·kbar−1.
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