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Pseudoelasticity and aftereffect kinetics of solid parahydrogen at 1.8 K

L. A. ALEKSEEVAPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , KharkovВ. Д. НацикPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , KharkovB. A. KhalinPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , KharkovA. V. PustovalovaPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR , Kharkov

Soviet Journal of Low Temperature Physicsjournal1988en

ABI

Annotatsiya

Strain curves are obtained for high-purity single crystals of parahydrogen at T = 1.8 K under axial elongation resulting from a stepwise loading followed by a stepwise unloading. Samples were grown after diffusive passage of hydrogen through nickel, and the impurity concentration did not exceed 0.001%. A large (∼10%) reversible strain of hysteresis type (pseudoelasticity) was observed and found to be of the same type as under compression (A. N. Aleksandrovskii, E. A. Kir’yanova, V. G. Manzhelii, et al., Fiz. Nizk. Temp. 13, 1095 (1987) [Sov. J. Low Temp. Phys. 13, 623 (October 1987)]). The kinetics of deformation of the opposite sign obtained during the unloading process is studied and a logarithmic time dependence of this process as well as its stepwise occurrence are established. Possible mechanisms of pseudoelasticity of pure parahydrogen are discussed.

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Mavzular

Quantum, superfluid, helium dynamics High-pressure geophysics and materials Superconducting Materials and Applications

Identifikatorlar

DOI: 10.1063/10.0032050

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