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arXiv · 2011.13747

Oscillating nematic aerogel in superfluid 3He

V. V. Dmitriev·M. S. Kutuzov·A. A. Soldatov·E. V. Surovtsev·A. N. Yudin
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Abstract

We present experiments on nematic aerogel oscillating in superfluid $^3$He. This aerogel consists of nearly parallel mullite strands and is attached to a vibrating wire moving along the direction of the strands. Previous nuclear magnetic resonance experiments in $^3$He confined in similar aerogel sample have shown that the superfluid transition of $^3$He in aerogel occurs into the polar phase and the transition temperature ($T_{ca}$) is only slightly suppressed with respect to the superfluid transition temperature of bulk $^3$He. In present experiments we observed a change in resonant properties of the vibrating wire at $T=T_{ca}$ and found that below $T_{ca}$ an additional resonance mode is excited which is coupled to the main resonance.

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V. V. Dmitriev, M. S. Kutuzov, A. A. Soldatov, E. V. Surovtsev, A. N. Yudin. 2020-11-27. Oscillating nematic aerogel in superfluid 3He. https://doi.org/10.1134/s0021364020240017

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