Abstract
We present experiments on nematic aerogel oscillating in superfluid 3He. 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 3He confined in similar aerogel sample have shown that the superfluid transition of 3He in aerogel occurs into the polar phase and the transition temperature (Tca) is only slightly suppressed with respect to the superfluid transition temperature of bulk 3He. In present experiments, we observed a change in the resonant properties of the vibrating wire at T = Tca and found that an additional resonance mode coupled to the main resonance is excited below Tca.
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Acknowledgments
We are grateful to V. I.Marchenko for useful discussions.
Funding
This work was supported by the Russian Science Foundation (project #18-12-00384).
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Dmitriev, V.V., Kutuzov, M.S., Soldatov, A.A. et al. Oscillating Nematic Aerogel in Superfluid 3He. Jetp Lett. 112, 780–785 (2020). https://doi.org/10.1134/S0021364020240017
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DOI: https://doi.org/10.1134/S0021364020240017