MAGNETIC REFRIGERATION MATERIAL, COLD STORAGE MATERIAL, AND REFRIGERATION SYSTEM USING THEM

摘要

PROBLEM TO BE SOLVED: To provide a new magnetic refrigeration material and a cold storage material effective in the vicinity of 2-25 K, and to provide a refrigeration system which generates a temperature of about 2 K without using liquid helium.SOLUTION: ErCrSior ErMnSiis used as a magnetic refrigeration material. Furthermore, a temperature of about 2 K is generated without using liquid helium by combining a magnetic refrigeration system using the magnetic refrigeration material with a cryopump.