TY - JOUR
T1 - Ultrasonic investigation of rotating3He-B in strong magnetic fields
AU - Manninen, A. J.
AU - Kyynarainen, J. M.
AU - Torizuka, K.
AU - Pekola, J. P.
N1 - Funding Information:
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.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 1990/8
Y1 - 1990/8
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0025465946&partnerID=8YFLogxK
U2 - 10.1016/S0921-4526(90)81184-P
DO - 10.1016/S0921-4526(90)81184-P
M3 - Article
AN - SCOPUS:0025465946
VL - 165-166
SP - 669
EP - 670
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
IS - PART 1
ER -