Patent ID: 8211326

Claim:
A material that can be used for magnetic refrigeration, substantially having the general formula (A y B 1-y ) 2+δ C w D x E z wherein: A is selected from Mn and Co; B is selected from Fe and Cr; C, D and E are selected from P, B, Se, Ge, Ga, Si, Sn, N and Sb; w, x, y and z each denotes a concentration and is a number in the range greater than 0 to 1, and w+x+z=1; δ is a number from (−0.1)-(+0.1); and at least 90% of A is Mn; at least 90% of B is Fe; at least 90% of C is P; at least 90% of D is Ge; and at least 90% of E is Si.