Observation of Coherent Precession of Magnetization in Superfluid 3He A-phase

Abstract

We report the first observation of coherent quantum precession of magnetization (CQP) in superfluid 3He-A in aerogel. The coherent precession in bulk 3He A-phase is unstable due to the positive feedback of spin supercurrent to the gradient of phase of precession. It was predicted that the homogeneous precession will be stable if the orbital momentum of 3He-A could be oriented along the magnetic field. We have succeeded to prepare this configuration by emerging 3He in uniaxially-deformed anisotropic aerogel. The dissipation rate of coherent precession states in aerogel is much larger then one in bulk 3He-B. We propose a mechanism of this dissipation.

arXiv comment4 pages, 4 figures

References in corpus (4)

• Magnon condensation into Q-ball in 3He-B
• Magnetization and Spin-Diffusion of Liquid 3He in Aerogel
• The A-B Transition of Superfluid Helium-3 in Aerogel and the Effect of Anisotropic Scattering
• Random anisotropy disorder in superfluid 3He-A in aerogel

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• Impurity Effects of Aerogel in Superfluid ${}^3$He
• On the nonlinear NMR and magnon BEC in antiferromagnetic materials with coupled electron-nuclear spin precession
• Bose-Einstein condensation of magnons and spin superfluidity in the polar phase of ${}^3$He
• Modification of the 3He Phase Diagram by Anisotropic Disorder
• Magnon BEC in superfluid 3He-A
• Magnonics and Supermagnonics
• Mass coupling and $Q^{-1}ofimpurity-limitednormal$^3$He in a torsion pendulum