Annealing Effect for Supersolid Fraction in $^4$He
Other Condensed Matter
2009-11-13 v1
Abstract
We report on experimental confirmation of the non-classical rotational inertia (NCRI) in solid helium samples originally reported by Kim and Chan. The onset of NCRI was observed at temperatures below ~400 mK. The ac velocity for initiation of the NCRI suppression is estimated to be ~10 m/sec. After an additional annealing of the sample at K for 12 hours, ~ 10% relative increase of NCRI fraction was observed. Then after repeated annealing with the same conditions, the NCRI fraction was saturated. It differs from Reppy's observation on a low pressure solid sample.
Keywords
Cite
@article{arxiv.cond-mat/0702632,
title = {Annealing Effect for Supersolid Fraction in $^4$He},
author = {A. Penzev and Y. Yasuta and M. Kubota},
journal= {arXiv preprint arXiv:cond-mat/0702632},
year = {2009}
}
Comments
to be published in J. of Low Temp. Phys. (QFS2006 proceedings)