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Orbital damping of the oscillating superfluid He A-B interface at low temperatures

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Orbital damping of the oscillating superfluid He A-B interface at low temperatures. / Arrayas, M.; Fisher, S. N.; Haley, R. P.; Pickett, G. R.; Skyba, M.

In: Journal of Low Temperature Physics, Vol. 175, No. 5-6, 06.2014, p. 706-717.

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Arrayas, M. ; Fisher, S. N. ; Haley, R. P. ; Pickett, G. R. ; Skyba, M. / Orbital damping of the oscillating superfluid He A-B interface at low temperatures. In: Journal of Low Temperature Physics. 2014 ; Vol. 175, No. 5-6. pp. 706-717.

Bibtex

@article{9aa5597050ce46618ff1fb49ef1f93f2,
title = "Orbital damping of the oscillating superfluid He A-B interface at low temperatures",
abstract = "We present a model for the friction and effective mass of an oscillating superfluid He A-B interface due to orbital viscosity in the B-phase texture close to the interface. The model is applied to an experiment in which the A-B interface was stabilised in a magnetic field gradient at the transition field mT at 0 bar pressure and at a very low temperature mK. The interface was then oscillated by applying a small additional field at frequencies in the range 0.1-100 Hz. The response of the interface is governed by friction and by its effective mass. The measured dissipation does not fit theoretical predictions based either on the Andreev scattering of thermal quasiparticles or by pair-breaking from the moving interface. We describe a new mechanism based on the redistribution of thermal quasiparticle excitations in the B-phase texture engendered by the moving interface. This gives rise to friction via orbital viscosity and generates a significant effective mass of the interface. We have incorporated this mechanism into a simple preliminary model which provides reasonable agreement with the measured behaviour.",
keywords = "Superfluid He-3, A-B Interface, Dissipation, Orbital viscosity, MAGNETIC-FIELD, PHASE-BOUNDARY, SURFACE-TENSION, TRANSITION, HE-3-B, DYNAMICS, GEOMETRY, VELOCITY, ANGLE, THERMODYNAMICS",
author = "M. Arrayas and Fisher, {S. N.} and Haley, {R. P.} and Pickett, {G. R.} and M. Skyba",
note = "{\textcopyright} The Author(s) 2014. This article is published with open access at Springerlink.com",
year = "2014",
month = jun,
doi = "10.1007/s10909-014-1161-1",
language = "English",
volume = "175",
pages = "706--717",
journal = "Journal of Low Temperature Physics",
issn = "0022-2291",
publisher = "SPRINGER/PLENUM PUBLISHERS",
number = "5-6",

}

RIS

TY - JOUR

T1 - Orbital damping of the oscillating superfluid He A-B interface at low temperatures

AU - Arrayas, M.

AU - Fisher, S. N.

AU - Haley, R. P.

AU - Pickett, G. R.

AU - Skyba, M.

N1 - © The Author(s) 2014. This article is published with open access at Springerlink.com

PY - 2014/6

Y1 - 2014/6

N2 - We present a model for the friction and effective mass of an oscillating superfluid He A-B interface due to orbital viscosity in the B-phase texture close to the interface. The model is applied to an experiment in which the A-B interface was stabilised in a magnetic field gradient at the transition field mT at 0 bar pressure and at a very low temperature mK. The interface was then oscillated by applying a small additional field at frequencies in the range 0.1-100 Hz. The response of the interface is governed by friction and by its effective mass. The measured dissipation does not fit theoretical predictions based either on the Andreev scattering of thermal quasiparticles or by pair-breaking from the moving interface. We describe a new mechanism based on the redistribution of thermal quasiparticle excitations in the B-phase texture engendered by the moving interface. This gives rise to friction via orbital viscosity and generates a significant effective mass of the interface. We have incorporated this mechanism into a simple preliminary model which provides reasonable agreement with the measured behaviour.

AB - We present a model for the friction and effective mass of an oscillating superfluid He A-B interface due to orbital viscosity in the B-phase texture close to the interface. The model is applied to an experiment in which the A-B interface was stabilised in a magnetic field gradient at the transition field mT at 0 bar pressure and at a very low temperature mK. The interface was then oscillated by applying a small additional field at frequencies in the range 0.1-100 Hz. The response of the interface is governed by friction and by its effective mass. The measured dissipation does not fit theoretical predictions based either on the Andreev scattering of thermal quasiparticles or by pair-breaking from the moving interface. We describe a new mechanism based on the redistribution of thermal quasiparticle excitations in the B-phase texture engendered by the moving interface. This gives rise to friction via orbital viscosity and generates a significant effective mass of the interface. We have incorporated this mechanism into a simple preliminary model which provides reasonable agreement with the measured behaviour.

KW - Superfluid He-3

KW - A-B Interface

KW - Dissipation

KW - Orbital viscosity

KW - MAGNETIC-FIELD

KW - PHASE-BOUNDARY

KW - SURFACE-TENSION

KW - TRANSITION

KW - HE-3-B

KW - DYNAMICS

KW - GEOMETRY

KW - VELOCITY

KW - ANGLE

KW - THERMODYNAMICS

U2 - 10.1007/s10909-014-1161-1

DO - 10.1007/s10909-014-1161-1

M3 - Journal article

VL - 175

SP - 706

EP - 717

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 5-6

ER -