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Quartz Crystal Microbalance Study of Superfluid 4He Films on Gold and Porous Gold Surfaces

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Abstract

The superfluid transition in sub-rnonolayer 4He films was studied using quartz crystal microbalance (QCM). We recently improved the QCM technique by replacing the conventional gold electrodes with porous gold, thus increasing the surface area and therefore sensitivity by 40 times. Simugtaneous measurements were taken for QCMs with flat and porous gold electrodes contained within the same copper cell. For both QCMs the superfluid transition temperature was found to be proportional to the 4He film thickness. The superfluid transition temperature at each film coverage was greater for porous gold than for flat gold electrodes.

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Authors and Affiliations

  1. Department of Physics, Penn State University, University Park, PA, 16802, USA

    Mitsunori Hieda, Anthony C. Clark & M. H. W. Chan

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  1. Mitsunori Hieda
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  2. Anthony C. Clark
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  3. M. H. W. Chan
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Hieda, M., Clark, A.C. & Chan, M.H.W. Quartz Crystal Microbalance Study of Superfluid 4He Films on Gold and Porous Gold Surfaces. Journal of Low Temperature Physics 134, 91–96 (2004). https://doi.org/10.1023/B:JOLT.0000012540.32796.e0

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  • DOI: https://doi.org/10.1023/B:JOLT.0000012540.32796.e0

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