Dependence of the inverse magnetocaloric effect on the field-change rate in Mn₃GaC and its relationship to the kinetics of the phase transition

We study the dependence of the magnetocaloric effect on the magnetic field-change-rate the first order magnetostructural transition in Mn₃GaC by measuring the adiabatic temperature change ΔT at three different time scales: 11 mTs^-1, 700 mTs^-1, and ~1000 Ts^-1. We find that the Maximum adiabatic temperature-change of about 5 K is reached in the 11 mTs^-1 and 700 mTs^-1 rates, whereas for the ~1000 Ts^-1 the transition lags the change in the magnetic field so that the maximum adiabatic temperature-change is not attained.