QFS2016 Book of Abstracts

Abstracts

P2.9 NMR Studies of Superfluid Polar Phase of 3 He Dmitriev V.V.(1), Soldatov A.A.(1,2), Yudin A.N.(1)

1) P.L. Kapitza Institute for Physical Problems of RAS, 119334 Moscow, Russia 2) Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Russia We report results of NMR experiments in superfluid polar phase of 3 He. This phase is not realized in bulk 3 He, but can be stabilized in 3 He confined in a new type of aerogel (nafen) which strands are nearly parallel to one another. In our experiments the polar phase was observed in all used samples of nafen with porosities from 98% down to 77%. It was found that the region of existence of this phase essentially depends on nafen porosity, pressure and on 4 He coverage of the nafen strands. NMR properties of the polar phase and influence of spin supercurrents on the spin dynamics were investigated. Possible future experiments will be also discussed in the talk.

P2.10 The Quantum Phenomena of Magnonics. Bunkov Yury(1, 2), Tagirov Murat(2).

1) Institut Neel, CNRS et Universite Grenoble-Alpes, F-38042 Grenoble, France 2) Kazan Federal University, 420008, Kremlyovskaja 18, Kazan, Russia The spin supercurrent and magnon BEC was observed in many magnetically ordered materials like Superfluid phases of 3 He-A and 3 He-B, antiferromagnets with Suhl-Nakamura interaction, YIG films ets. The different quantum phenomena were observed: Josephson effect, Goldstone modes, quantum vortex, critical current, phase slippage ets. In this presentation we will discuss the resent progress in these investigations.

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