A theoretical model of the magneto-caloric effect in manganese perovskites

Recently, a large magneto-caloric effect (MCE) in perovskite materials has generated growing interests among scientists and manufacturers, because of its assessable and practical potential for the field of magnetic refrigeration. Nevertheless, further efforts of seeking a proper material that has a large magnetic-entropy change (ΔS$\sub$M/) or a large adiabatic temperature change (ΔT$\sub$ad/), i.e. a large MCE, in a vast variety of temperatures have been extensively devoted, but no theoretical treatments are satisfactorily made.