Magnetic refrigeration material, magnetic refrigeration system using the same, and cold storage material

摘要

Problem to be solved: to provide a high performance magnetic refrigeration material capable of efficiently cooling from liquid nitrogen temperature (77K) to liquefaction temperature (20k) of hydrogen.Magnetic refrigeration material containing at least one of the compounds comprising ho5si3, er5ge3 and er5ga3 groups.The holmium silicide (ho5si3) with hexagonal structure has an applied magnetic field greater than 0.08 [J / cm3 K at 22 to 32 Kelvin and larger than 0.04 [cm / cm3 k] from 0 to 5 8 to 94 Kelvin have a magnetic entropy change greater than 0.02 [J / cm3k].Er5ga3 is 6 to 15 Kelvin and has a magnetic entropy change larger than 0.08 [J / cm3k] under the conditions of 0 to 5 Tesla.Diagram