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Journal of Low Temperature Physics

, Volume 184, Issue 5–6, pp 1007–1014 | Cite as

NMR Properties of the Polar Phase of Superfluid \(^3\)He in Anisotropic Aerogel Under Rotation

  • V. P. Mineev
Article

Abstract

The polar phase of superfluid \(^3\)He is stable in “nematically ordered” densed aerogel. A rotating vessel with the polar superfluid can be filled either by an array of the single quantum vortices or by an array of the half-quantum vortices. It is shown that the inhomogeneous distribution of the spin part of the order parameter arising in an array of half-quantum vortices in strong enough magnetic field tilted to the average direction of aerogel strands leads to the appearance of a satellite in the NMR signal shifted in the negative direction with respect to the Larmor frequency. The satellite is absent in the case of an array of single quantum vortices which allows to distinguish these two configurations. The polar state in the anisotropic aerogel with lower density transforms at lower temperatures to the axipolar state. The array of half-quantum vortices created in the polar phase keeps its structure under transition to the axipolar state. The temperature dependence of the vortex-satellite NMR frequency is found to be slower below the transition temperature to the axipolar state.

Keywords

Vortex Soliton Larmor Frequency Polar Phase Anisotropy Axis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The author is indebted to V. Eltsov and V. Dmitriev for their useful discussions and especially to G. Volovik for numerous and careful comments which have allowed me to correct the initially not properly written text.

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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  1. 1.Commissariat a l’Energie Atomique, INAC / SPSMSGrenobleFrance

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