Patent ID: 7914628

Claim:
A magnetic refrigeration material, comprising: a chemical composition including at least one first element selected from the group consisting of Y, La, Ce, Pr, Nd, Sm , Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb in a total of 4 to 15 atomic percent; at least one second element selected from members of the group consisting of Fe, Co, Ni, Mn and Cr in a total of 60 to 93 atomic percent; at least one third element selected from members of the group consisting of Si, C, Ge, Al, Ga and In in a total of 2.5 to 23.5 atomic percent; and B of 0.5 atomic percent to 1.5 atomic percent; and material phases including NaZn 13 type crystal structure phase not containing B; a bcc crystal structure phase comprising Fe as the main constituent element with phase region size of 20 μm or less; and a third phase containing the first element, the third element and B and not containing Fe, wherein the magnetic refrigeration material is obtained through a forced cooling process.