Effect of off-stoichiometry and Ta doping on Fe-rich (Mn,Fe)₂(P,Si) based giant magnetocaloric materials

The influence of off-stoichiometry and of doping with the 5d transition metal Ta has been studied in the quaternary (Mn,Fe)₂(P,Si)-based compound, which is one of the most promising materials systems for magnetic refrigeration. It is found that Ta substitution can decrease the transition temperature T_tr, while the...