Low Temperature Physics: 39, 780 (2013); https://doi.org/10.1063/1.4821077
Fizika Nizkikh Temperatur: Volume 39, Number 9 (September 2013), p. 1006-1011    ( to contents , go back )

Formation of superfluid liquid pocket in aerogel and its solidification by cooling

H. Matsuda, A. Ochi, R. Isozaki, R. Nomura, and Y. Okuda

Department of Physics, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152-8551, Japan
E-mail: nomura.r.aa@m.titech.ac.jp
pos Анотація:

Received February 25, 2013


Formation of superfluid liquid pockets of 4He surrounded by 4He crystals were observed in an aerogel of 96% porosity. The liquid pockets did not crystallize by application of pressure but crystallized via avalanche by cooling below a particular temperature. The crystallization by cooling was also observed when crystals occupied a smaller portion of the aerogel. Driving force for the crystallization by cooling and possible mass transport process are discussed.

PACS: 64.70.D– Solid-liquid transitions;
PACS: 67.80.bf Liquid-solid interfaces; growth kinetics;
PACS: 67.25.D– Superfluid phase.

Key words: superfluid 4He, crystal growth, aerogel, supersolid.

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