LAUSR

Abstract Bridgman method with stationary crucible was used to grow NiMnCuGa single crystal. Microstructure observations, as well as XRD pattern, revealed a presence of martensitic structure at room temperature. Crystal structure was determined as a non-modulated tetragonal martensite. The phase transition occurred at 296 K and 290 K on heating and cooling, respectively. Magnetic entropy change (ΔS M ) reached a peak value of −9.86 J/kgK at the field of 1520 kA/m. Refrigerant capacity (RC), calculated at FWHM of the ΔS M peak, reached a value of 28.5 J/kg. Directly measured adiabatic temperature change (ΔT ad ) spread over 51 K range and its maximum value reached 0.23 K at 1520 kA/m field.