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Superflow-stabilized nonlinear NMR in rotating 3He-B
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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Physical Review B, Volume 59, issue 1, pp. 165-168
Abstract
Nonlinear spin precession has been observed in 3He−B in large counterflow of the normal and superfluid fractions. The new precessing state is stabilized at a high rf excitation level and displays frequency-locked 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 “non-Leggett” configuration with broken spin-orbit coupling. The resonance shift depends on the tipping angle θ of the magnetization as ω−ωL=(Ω2B/2ωL)(cosθ−1/5). The phase diagram of the precessing modes with arbitrary orientation of L is constructed.
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Dmitriev, V V, Eltsov, V B, Krusius, M, Ruohio, J J & Volovik, G E 1999, 'Superflow-stabilized nonlinear NMR in rotating 3He-B', Physical Review B, vol. 59, no. 1, pp. 165-168. https://doi.org/10.1103/PhysRevB.59.165