| 简介 |
PROBLEM TO BE SOLVED : To provide a cold storage material which has a large specific heat around 4K - an important thing for the material to be put to practical use as a cold storage material for very low temperatures and which is hard to be influenced by magnetic field, and to provide a refrigerator using such a cold storage material.
SOLUTION : The cold storage material consists of a rare earth nitride having a composition substantially represented by the general formula : (Ho1-x-yRxAy)N [wherein R indicates at least one element selected from among Sm, Er and Yb; A indicates at least one element selected from rare earth elements excluding the above R element; and x and y are each a number (atomic ratio) in the range of 0
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