Magnetic refrigerant.

摘要

A magnetic refrigerant having a composition represented by <MATH> wherein Ln is at least one element selected from Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Yb; A is any one of elements of Al and Ga; M is at least one element selected from Fe, Co, Ni, Cu and Ag; each of a, b and c is atomic %, with the proviso that a + b + c = 100 atomic %, 20 atomic % </= a </= 80 atomic %, 5 atomic % </= b </= 50 atomic %, 5 atomic % </= c </= 60 atomic %, and having an amorphous structure with a difference DELTA T of 10 K or more between a glass transition temperature Tg and a crystallization temperature Tx.