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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Plastic properties of solid 4He probed by a moving wire
T2 - viscoelastic and stochastic behavior under high stress
AU - Ahlstrom, Sean
AU - Bradley, Ian
AU - Clovecko, Marcel
AU - Fisher, Shaun
AU - Guénault, Tony
AU - Guise, Edward Ashley
AU - Haley, Richard
AU - Kumar, Mukesh
AU - McClintock, Peter V. E.
AU - Pickett, George
AU - Polturak, E.
AU - Poole, Malcolm
AU - Todoshchenko, Igor A.
AU - Tsepelin, Viktor
AU - Woods, Andrew
N1 - This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
PY - 2014/4
Y1 - 2014/4
N2 - We present measurements of a thin wire moving through solid 4He. Measurements were made over a wide temperature range at pressures close to the melting curve. We describe the new experimental technique and present preliminary measurements at relatively high driving forces (stresses) and velocities (strain rates). The wire moves by plastic deformation of the surrounding solid facilitated by quantum tunneling of vacancies and the motion of defects. In the bcc phase we observe very pronounced viscoelastic effects with relaxation times spanning several orders of magnitude. In the hcp phase we observe stochastic step-like motion of the wire. During the step, the wire can move at extremely high velocities. On cooling, the wire ceases to move at a temperature of around 1 K. We are unable to detect any motion at lower temperatures, down to below 10 mK.
AB - We present measurements of a thin wire moving through solid 4He. Measurements were made over a wide temperature range at pressures close to the melting curve. We describe the new experimental technique and present preliminary measurements at relatively high driving forces (stresses) and velocities (strain rates). The wire moves by plastic deformation of the surrounding solid facilitated by quantum tunneling of vacancies and the motion of defects. In the bcc phase we observe very pronounced viscoelastic effects with relaxation times spanning several orders of magnitude. In the hcp phase we observe stochastic step-like motion of the wire. During the step, the wire can move at extremely high velocities. On cooling, the wire ceases to move at a temperature of around 1 K. We are unable to detect any motion at lower temperatures, down to below 10 mK.
KW - Solid 4He
KW - Viscoelastic properties
KW - Plasticity
U2 - 10.1007/s10909-013-0922-6
DO - 10.1007/s10909-013-0922-6
M3 - Journal article
VL - 175
SP - 147
EP - 153
JO - Journal of Low Temperature Physics
JF - Journal of Low Temperature Physics
SN - 0022-2291
IS - 1-2
ER -