Ultrasonic investigation of rotating3He-B in strong magnetic fields

A. J. Manninen; J. M. Kyynarainen; K. Torizuka; J. P. Pekola

doi:10.1016/S0921-4526(90)81184-P

Ultrasonic investigation of rotating³He-B in strong magnetic fields

A. J. Manninen^*
, J. M. Kyynarainen
, K. Torizuka
, J. P. Pekola

^*Corresponding author for this work

Not published at VTT

Aalto University

Research output: Contribution to journal › Article › Scientific › peer-review

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
Pages (from-to)	669-670
Number of pages	2
Journal	Physica B: Physics of Condensed Matter
Volume	165-166
Issue number	PART 1
DOIs	https://doi.org/10.1016/S0921-4526(90)81184-P
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.

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title = "Ultrasonic investigation of rotating3He-B in strong magnetic fields",

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.",

author = "Manninen, \{A. J.\} and Kyynarainen, \{J. M.\} and K. Torizuka and Pekola, \{J. P.\}",

note = "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.",

year = "1990",

month = aug,

doi = "10.1016/S0921-4526(90)81184-P",

language = "English",

volume = "165-166",

pages = "669--670",

journal = "Physica B: Physics of Condensed Matter",

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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 - https://www.scopus.com/pages/publications/0025465946

U2 - 10.1016/S0921-4526(90)81184-P

DO - 10.1016/S0921-4526(90)81184-P

M3 - Article

AN - SCOPUS:0025465946

SN - 0921-4526

VL - 165-166

SP - 669

EP - 670

JO - Physica B: Physics of Condensed Matter

JF - Physica B: Physics of Condensed Matter

IS - PART 1

ER -

Ultrasonic investigation of rotating³He-B in strong magnetic fields

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