Nonlinear NMR in a superfluid B phase of 3He in aerogel |
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| Authors: | V. V. Dmitriev V. V. Zavjalov D. E. Zmeev I. V. Kosarev N. Mulders |
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| Affiliation: | (1) Kapitza Institute of Physical Problems, Russian Academy of Sciences, Moscow, 119334, Russia;(2) Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA |
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| Abstract: | The properties of liquid 3He in a low-density aerogel preliminarily covered with a few monolayers of 4He were studied by pulsed and nonlinear CW NMR techniques. It was found that an NMR frequency shift from the Larmor value exhibits a sharp increase at a magnetization tilting angle exceeding 104°. Nonlinear CW NMR signals related to the formation of a macroscopic region featuring homogeneous precession of the magnetization (homogeneous precession domain) were observed. The experimental results confirm that the low-temperature superfluid 3He phase in the aerogel is analogous to the B-phase in bulk 3He and indicate that the spin supercurrents play an important role in the spin dynamics of superfluid 3He in aerogel. |
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