New Modes of Stable Spin Precession in Superfluid 3He-B
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The cw NMR response of 3 He-B is investigated in large rf excitation fields, which exceed in magnitude the equivalent of the spin-orbit coupling. New states of stable spin precession are observed. The Leggett-Takagi spin-dynamic equations are solved numerically with the proper experimental parameters, the results are found to reproduce most of the experimental features, and allow an identification of the new modes. Vortex lines or vortex-free counterflow in the rotating superfluid have not been found to influence the measured NMR signatures of the new modes.
KeywordsVortex Magnetic Material Experimental Parameter Vortex Line Experimental Feature
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