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Spin dynamics of superfluid3He-B in a slab geometry

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Abstract

The spin dynamics and the spin relaxation mechanisms of the superfluid3He-B were studied by using the NMR method in a slab geometry, where the superfluid3He-B was confined between narrow parallel plates with a gap smaller than the healing length of then-texture and the magnetic field was applied parallel to the plates. The relaxation parameter in the Leggett-Takagi (LT) equations was determined from a line width measurement of the transverse CW NMR. By using the pulsed NMR method, spin dynamics were studied in the nonlinear region. The observed spin dynamics were in good agreement with a numerical calculation of the LT equations together with the relaxation parameter determined by the CW NMR. When the tipping angle became larger than a certain critical value, the superfluid3He-B entered the Brinkman-Smith (BS) state. In this case, we observed the slow relaxation process in the BS state and then the rapid recovery process from the BS state to the initial “non-Leggett configuration.” The slow process in the BS state was attributed to the surface relaxation mechanism due to the torque from the surface-field energy.

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Ishikawa, O., Sasaki, Y., Mizusaki, T. et al. Spin dynamics of superfluid3He-B in a slab geometry. J Low Temp Phys 75, 35–58 (1989). https://doi.org/10.1007/BF00688743

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  • DOI: https://doi.org/10.1007/BF00688743

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