Enhanced elastocaloric effect and refrigeration properties in a Si-doped Ni-Mn-In shape memory alloy

We demonstrate giant elastocaloric effect and outstanding refrigeration capacity in a <0 0 1>A textured Ni50Mn35In13Si2 alloy with large transformation entropy change ΔStr and low-hysteresis ΔThys. On unloading from a relatively low compressive stress of 300 MPa, giant adiabatic temperature variation ΔTad up to –17.7 K was realized. Moreover, large stress-induced entropy change ΔSσ of 25.9 J kg–1 K–1 and giant refrigeration capacity RCσ of 1330 J kg–1 were achieved under the compressive stress of 300 MPa. Simultaneously achieving giant ΔTad and outstanding refrigeration capacity indicates that this alloy is promising to be the candidate material for elastocaloric refrigeration.