Abstract
We have studied ultrasonic attenuation in rotating 3He-B at low pressures (< 10 bar) in magnetic fields up to 300 mT. In a strong field, the energy gap Δ in 3He-B is anisotropic, and the attenuation α of zero sound depends on the orientation of Δ. Because vortices and the counterflow between the normal and superfluid components of the liquid turn the anisotropy axis of Δ, a clear dependence of α on the rotation velocity Ω can be observed. The magnitude of this response is not a linear, sometimes not even a monotonic function of Ω. Its dependence on the magnetic field is anomalous around H = 200 mT. We have also observed a metastable state in rotating 3He-B, which can be created by rotating the sample while cooling through the AB-transition. The lifetime of this state is on the order of 10 minutes.
Original language | English |
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Pages (from-to) | 669-670 |
Number of pages | 2 |
Journal | Physica B: Physics of Condensed Matter |
Volume | 165-166 |
Issue number | PART 1 |
DOIs | |
Publication status | Published - Aug 1990 |
MoE publication type | A1 Journal article-refereed |
Funding
ACKNOWLEDGEMENTS This work was financially supported by the Academy of Finland and the U.S.S.R. Academy of Sciences through project ROTA, and by the K&ber-Stiftung of Hamburg.