Torsion pendulum studies of thin 3He slabs

A high precision torsional oscillator has been developed for the detection of two dimensional superfluidity in 3He films of thickness comparable to the superfluid coherence length, 70 nm at T = 0. The mass loading from such a film can be detected with a 0.1% resolution. Measurements on normal films...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2003-05, Vol.329-333, p.133-134
Main Authors: Parpia, J, Morley, G W, Vestey, P, Nyeki, J, Cowan, B, Saunders, J
Format: Article
Language:English
Online Access:Get full text
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Summary:A high precision torsional oscillator has been developed for the detection of two dimensional superfluidity in 3He films of thickness comparable to the superfluid coherence length, 70 nm at T = 0. The mass loading from such a film can be detected with a 0.1% resolution. Measurements on normal films show an unexpected de-coupling from the surface with decreasing temperature, below 60 mK. The frequency shift and dissipation data can be interpreted using a phenomenological interfacial friction model.
ISSN:0921-4526