MAGNETIC REFRIGERATING MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a magnetic refrigerating material which is inexpensive, is excellent in magnetic refrigeration performance, and is wide in an operating temperature range. SOLUTION: The magnetic refrigerating material is a material whose temperature changes based on a change in a magnetic field. The related magnetic refrigerating material is composed of a compound expressed by the following general formula (1):(1) La(Fe1-x-yCoySix)13, where x is 0.05 to 0.16, y is 0.04 to 0.10, and 1-x-y is 0.74 to 0.91. The composition range is a range shown by slash lines of Fog. 1. In the general formula (1), x is preferably 0.06 to 0.12; y is 0.04 to 0.08, and 1-x-y is 0.82 to 0.88. The amount of change of the magnetic entropy of the magnetic refrigerating material (-▵SM) is preferably 5 to 11 J/kg K; the relative cooling power (RCP, Relative Cooling Power) indicating the magnetic refrigeration performance is preferably 140 to 180 J/kg. COPYRIGHT: (C)2010,JPO&INPIT