Study of superfluid super(3)He films with a micro-electro-mechanical device

A micro-electro-mechanical system (MEMS) device with a 1.25 mu m gap between a movable plate and the substrate was immersed in superfluid super(3)He and cooled below 500 mu K at 21.2 bar. Mechanical resonances of its shear motion were monitored on warming from the base temperature. Our preliminary r...

Full description

Saved in:
Bibliographic Details
Published inJournal of physics. Conference series Vol. 568; pp. 1 - 5
Main Authors Zheng, P, Jiang, W G, Barquist, C S, Chan, H B, Lee, Y
Format Journal Article
LanguageEnglish
Published 01.01.2014
Subjects
Approximation
Damping
Devices
Fluids
Microelectromechanical systems
Oscillators
Quality factor
Superfluidity
Online AccessGet full text

Cover

More Information
Summary:A micro-electro-mechanical system (MEMS) device with a 1.25 mu m gap between a movable plate and the substrate was immersed in superfluid super(3)He and cooled below 500 mu K at 21.2 bar. Mechanical resonances of its shear motion were monitored on warming from the base temperature. Our preliminary results demonstrate increasing damping and decreasing resonance frequencies with temperature, consistent with a thermal damping model caused by thermal quasiparticles. The quality factor (Q) of the oscillator remains surprisingly low (Q [approximate] 30) down to 0.2T/Tc, about 4 orders of magnitude smaller than the value in vacuum at 4K. The average superfluid gap was determined to be significantly suppressed from the value in bulk at the corresponding pressure.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
content type line 23
ObjectType-Feature-2
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/568/1/012030