Phys. Rev. Lett. 101, 055301 (2008) [4 pages]Coherent Precession of Magnetization in the Superfluid 3He A-PhaseReceived 15 April 2008; revised 12 June 2008; published 1 August 2008 We report the first observation of coherent precession of magnetization in superfluid 3He A-like phase (CP-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 the 3He A-phase can 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 than that in bulk 3He B-phase. We propose a mechanism of this dissipation. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.101.055301
DOI:
10.1103/PhysRevLett.101.055301
PACS:
67.30.he, 05.30.Jp, 67.30.hj
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