Experimental Curves of Entropy and Susceptibility versus Temperature for Copper Nuclear Spins Down to the Ordered State
- 9 May 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 50 (19), 1516-1519
- https://doi.org/10.1103/physrevlett.50.1516
Abstract
The entropy and susceptibility of copper nuclear spins below 1 μK have been measured as a function of temperature both in the paramagnetic and in the antiferromagnetic states. The critical temperature is 63± 10 nK, about 30% of the mean-field estimate. The results are in agreement with calculations based on the spin-wave spectrum of the dipolar and the Ruderman-Kittel interactions in the fee lattice of copper.Keywords
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