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 <001>textured NiMnInSialloy with large transformation entropy change △Sand low-hysteresis △T.On unloading from a relatively low compressive stress of 300 MPa,giant adiabatic temperature variation △Tup to-17.7 K was realized.Moreover,large stress-induced entropy change △Sof 25.9 J kgKand giant refrigeration capacity RCof 1330 J kgwere achieved under the compressive stress of 300 MPa.Simultaneously achieving giant △Tand outstanding refrigeration capacity indicates that this alloy is promising to be the candidate material for elastocaloric refrigeration.