Quartz microbalance study of thick 4He film near the superfluid transition

Rafael Garcia; S. Jordan; J. Lazzaretti; Moses H.W. Chan

doi:10.1023/b:jolt.0000012604.09003.ef

Quartz microbalance study of thick ⁴He film near the superfluid transition

Rafael Garcia, S. Jordan, J. Lazzaretti, Moses H.W. Chan

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2 Scopus citations

Abstract

We present the results of a quartz microbalance measurement of a ∼440 Å thick ⁴He film adsorbed on Au. This measurement confirms the result of an earlier capacitance measurement that showed a dip in the film thickness just below T_λ due to the critical Casimir force. The magnitude of the dip in the two measurements agrees within 15% . In addition to the dip, we see a signal due to the onset of superfluidity in the film. An apparent peak in the film thickness, not observed previously, is also found coinciding closely with the bulk T_λ. This extra feature may be due to a sound resonance in the cell associated with the bulk fluid.

Original language	English (US)
Pages (from-to)	527-533
Number of pages	7
Journal	Journal of Low Temperature Physics
Volume	134
Issue number	1-2
DOIs	https://doi.org/10.1023/b:jolt.0000012604.09003.ef
State	Published - Jan 2004

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Materials Science(all)
Condensed Matter Physics

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title = "Quartz microbalance study of thick 4He film near the superfluid transition",

abstract = "We present the results of a quartz microbalance measurement of a ∼440 {\AA} thick 4He film adsorbed on Au. This measurement confirms the result of an earlier capacitance measurement that showed a dip in the film thickness just below Tλ due to the critical Casimir force. The magnitude of the dip in the two measurements agrees within 15% . In addition to the dip, we see a signal due to the onset of superfluidity in the film. An apparent peak in the film thickness, not observed previously, is also found coinciding closely with the bulk Tλ. This extra feature may be due to a sound resonance in the cell associated with the bulk fluid.",

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AU - Garcia, Rafael

AU - Jordan, S.

AU - Lazzaretti, J.

AU - Chan, Moses H.W.

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Y1 - 2004/1

N2 - We present the results of a quartz microbalance measurement of a ∼440 Å thick 4He film adsorbed on Au. This measurement confirms the result of an earlier capacitance measurement that showed a dip in the film thickness just below Tλ due to the critical Casimir force. The magnitude of the dip in the two measurements agrees within 15% . In addition to the dip, we see a signal due to the onset of superfluidity in the film. An apparent peak in the film thickness, not observed previously, is also found coinciding closely with the bulk Tλ. This extra feature may be due to a sound resonance in the cell associated with the bulk fluid.

AB - We present the results of a quartz microbalance measurement of a ∼440 Å thick 4He film adsorbed on Au. This measurement confirms the result of an earlier capacitance measurement that showed a dip in the film thickness just below Tλ due to the critical Casimir force. The magnitude of the dip in the two measurements agrees within 15% . In addition to the dip, we see a signal due to the onset of superfluidity in the film. An apparent peak in the film thickness, not observed previously, is also found coinciding closely with the bulk Tλ. This extra feature may be due to a sound resonance in the cell associated with the bulk fluid.

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ER -

Quartz microbalance study of thick ⁴He film near the superfluid transition

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