Patent ID: 7993542

Claim:
A magnetic material consisting of a composition represented by the formula: (R1 1-y R2 y ) x (Fe) 100-x wherein: R1 is at least one element selected from Sm and Er, R2 is at least one element selected from Ce, Pr, Nd, Tb and Dy, x is a value satisfying 4≦x≦20 atomic %, and y is a value satisfying 0.05≦y≦0.95, wherein optionally a part of Fe is substituted by at least one element selected from Mn and Ni and wherein optionally a part of R2 is substituted by at least one element selected from La, Gd, Ho, Y, Tm and Yb, and wherein the crystal phase of the magnetic material consists essentially of a crystal phase with a structure analogous to at least one selected from a Th 2 Zn 17 crystal structure, a Th 2 Ni 17 crystal structure and a TbCu 7 crystal structure and has a Curie temperature of 320K or less.