Nucleation of Helium-4 crystals at Millikelvin Temperatures

被引：0
|
作者：
Penttila, J
Ruutu, J
Babkin, A
Hakonen, P
Sonin, E
机构：
[1] Low Temperature Laboratory, Helsinki University of Technology, FIN-02150 Espoo
[2] Ioffe Physico-Technical Institute
来源：
CZECHOSLOVAK JOURNAL OF PHYSICS | 1996年 / 46卷
关键词：
D O I：
10.1007/BF02569649
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have measured overpressures needed to nucleate helium-4 crystals at temperatures 2 mK - 1.0 K. Distributions of nucleation pressures were recorded using a sensitive capacitive pressure gauge with a resolution of 0.3 mu bar. Above 100 mK the median value of the distribution decreased according to T--1/2 as expected for thermal fluctuations. Below 100 mK we observed a crossover to a temperature independent regime.
引用
收藏
页码：467 / 468
页数：2
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