Specific heat measurements on bcc 3He from 3 to 300 mK

Abstract

We have measured the specific heat of bcc 3He (23. 8 cm 3/mole) from 3 to 300 mK. A constant value, 0.56 mK, is obtained for the exchange integral, in very good agreement with higher temperature bulk results. No contribution due to magnetic polarons appears below 50 mK. An excess in the specific heat is observed around 100 mK.