Annealing in solid $^4$He
Other Condensed Matter
2007-05-25 v1 Statistical Mechanics
Abstract
We have used a torsional oscillator with square cross section and a resonance frequency of 185 Hz to confirm the nonclassical rotational inertia (NCRI) discovered by Kim and Chan\cite{1,2}. We have also found a strong correlation between the NCRI signal and a high dissipation Q of 4 10 of the oscillation above the transition temperature. Here, we present preliminary results of the annealing process in He at a pressure of 26 bar. When holding the temperature constant above 1 K we have observed a immediate rise in the period and a slow decay of the dissipation. The equilibrium value of Q decreases with increasing temperature.
Cite
@article{arxiv.0705.3488,
title = {Annealing in solid $^4$He},
author = {Ann Sophie C. Rittner and John D. Reppy},
journal= {arXiv preprint arXiv:0705.3488},
year = {2007}
}