Superflowstabilized nonlinear NMR in rotating ^{3}HeB
Abstract
Nonlinear spin precession has been observed in ^{3}HeB in large counterflow of the normal and superfluid fractions. The new precessing state is stabilized at a high rf excitation level and displays frequencylocked precession over a large range of frequency shifts, with the magnitude of magnetization at its equilibrium value. Comparison to analytical and numerical calculation indicates that in this state the orbital angular momentum L of the Cooper pairs is oriented transverse to the external magnetic field in a ``nonLeggett'' configuration with broken spinorbit coupling. The resonance shift depends on the tipping angle θ of the magnetization as ωω_{L}=(Ω^{2}_{B}/2ω_{L})(cos θ1/5). The phase diagram of the precessing modes with arbitrary orientation of L is constructed.
 Publication:

Physical Review B
 Pub Date:
 January 1999
 DOI:
 10.1103/PhysRevB.59.165
 arXiv:
 arXiv:condmat/9805119
 Bibcode:
 1999PhRvB..59..165D
 Keywords:

 67.57.Fg;
 47.32.y;
 Textures and vortices;
 Vortex dynamics;
 rotating fluids;
 Condensed Matter
 EPrint:
 Revtex file, 5 pages, 4 figures, version submitted to Phys. Rev. Lett