Abstract
The growth rate of 4He crystals from superfluid is measured in the temperature range 1.2–1.75 K at supersaturations up to 40 mbar. The growth rate is observed to decrease at high supersaturations: above 5 mbar in the bcc phase and above 20 mbar in the hcp phase. The temperature dependence of the kinetic growth factor K is measured in the low-supersaturation limit. In the vicinity of the superfluid transition the kinetic growth factor exhibits critical behavior: K ∝ (Tλ−T)ε with the exponent ε=0.743±0.123. A jump in the growth factor is observed at the bcc-hcp transition point. The crystal growth kinetics problem is solved in the hydrodynamic approximation, explaining both the temperature behavior of K and the existence of the jump in the modification of the crystal structure.
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Zh. Éksp. Teor. Fiz. 114, 1313–1328 (October 1998)
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Maksimov, L.A., Tsymbalenko, V.L. Kinetics of crystal growth in superfluid helium at high temperatures. J. Exp. Theor. Phys. 87, 714–722 (1998). https://doi.org/10.1134/1.558713
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DOI: https://doi.org/10.1134/1.558713