Abstract
Measurements of the \(^4\)He mass flux through a cell filled with solid \(^3\)He–\(^4\)He mixtures in the \(^3\)He concentration range 0.17–220 ppm have demonstrated a reversible dramatic decrease in the flux on cooling through a concentration-dependent temperature \(T_\mathrm{d}\), close to the mixture phase separation temperature. For low \(^3\)He concentrations, the flux change transition is complete within 2 mK. We report on the stability of the flux for fixed temperatures in this transition region.
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Acknowledgments
We appreciate many discussions with colleagues, particularly B.V. Svistunov and W.J. Mullin. This work was supported primarily through funds provided by NSF DMR 12-05217.
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Vekhov, Y., Hallock, R.B. Mass Flux Stability at the \(T_\mathrm{d}\) Conductance Transition in Solid \(^3\)He–\(^4\)He Mixtures. J Low Temp Phys 183, 92–98 (2016). https://doi.org/10.1007/s10909-015-1385-8
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DOI: https://doi.org/10.1007/s10909-015-1385-8