Third sound and NMR studies of helium mixtures in nuclepore

Journal Article · Wed Nov 01 04:00:00 EST 1995 · Journal of Low Temperature Physics

DOI:https://doi.org/10.1007/BF00753328· OSTI ID:183398

Sheldon, P A; Hallock, R B ^[1]

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1. Univ. of Massachusetts, Amherst, MA (United States)

We report measurements of the third sound properties of {sup 3}He-{sup 4}He mixture films on Nuclepore. Using third sound resonance techniques, we measure the frequency, damping, amplitude and phase of third sound modes on a mixture film with a fixed coverage of {sup 4}He, n{sub 4 } = 0.39{angstrom}{sup -2}, as a function of drive power, P{sub dr}, 0.044 {le} P{sub dr} {le} 440 nW, temperature, 40 {le} T {le} 500 mK, and {sup 3}He coverage, 0.01 {le} n{sub 3} {le}0.06{angstrom}{sup -2}. Near T = 200 mK there is a sharp shift in the difference in phase, {delta}{Phi}, between the drive voltage fluctuation and the film thickness fluctuation.

• Sponsoring Organization: USDOE
• OSTI ID: 183398
• Report Number(s): CONF-950676--; CNN: Grant DMR 91-22348; Grant DMR 94-22208
• Journal Information: Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 101; ISSN JLTPAC; ISSN 0022-2291
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
HELIUM 3
HELIUM 4
MIXTURES
NUCLEAR MAGNETIC RESONANCE
POROUS MATERIALS
SUPERFLUIDITY
TEMPERATURE DEPENDENCE
THIRD SOUND