Patent ID: 8293030

Claim:
A method of implementation of a magnetocaloric agent, introducing to a magnetic refrigeration system at least one compound having the following general formula (I) and a crystalline structure of Ni 3 Sn 2 type: Mn 3-(x+x′) T x T′ x′ Sn 2-(y+y′) X y X′ y′ (I) in which: T and T′ are selected from the group consisting of: Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Ru, Zr, Hf, Nb, Mo, and a rare earth element selected from the group consisting of: La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Sc, Y, and Lu, X and X′ are selected from the group consisting of: Ga, Ge, Sb, In, Al, Cd, As, P, C, and Si, x, x′, y and y′ are from 0 to 1 x+x′≦0.5, y+y′≦0.5, x+y≦1, and provided that x+x′+y+y′ is different from 0.