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The kinetics of HCP-BCC structure phase transition is studied by precise pressure measurement technique in 4He crystals of different quality. An anomalous pressure behavior in bad quality crystals under constant volume conditions is detected just after HCP-BCC structure phase transition. A sharp pressure drop of 0.2 bar was observed at constant temperature. The subsequent pressure kinetics is a non-monotonic temperature function. The effect observed can be explained if we suppose that microscopic liquid droplets appear on the HCP-BCC interphase region in bad quality crystals. After the interphase region disappearance, these droplets are crystallized with pressure reduction. It is shown that this effect is absent in high quality thermal-treated crystals.Comment: 4 pages, 4 figure

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The bcc-hcp Phase Transition in 4He: Comparison with the Theory of Homogeneous Nucleation

Grigor’ev

Mikhin

Rudavskiı̆

et al. 2007

J Low Temp Phys

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Cited by 9 publications

References 5 publications

Visual Observations of Disordered Solid Helium

Visual Observations of Disordered Solid Helium

Effect of Crystal Quality on HCP-BCC Phase Transition in Solid 4He

The bcc-hcp Phase Transition in 4He: Comparison with the Theory of Homogeneous Nucleation

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