Nuclear Specific Heat of Holmium

Abstract
The specific heat of holmium has been measured between 0.95° and 4.2°K. The magnetic hyperfine interaction in holmium is so large that over this entire temperature range the nuclear hyperfine term represents the predominant contribution to the specific heat. Below 1.5°K the specific heat appears to be that of an ideal paramagnetic gas of spin 72. At 1°K the specific heat has the extremely large value of 0.37R.

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