| Autor: | C. P. Lusher, Brian Cowan, J. M. Parpia, John Saunders, Andrew Casey, Gavin W. Morley |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Phase transition
Materials science Condensed matter physics Transition temperature Diffusion Gasket Alloy engineering.material Condensed Matter Physics Atomic and Molecular Physics and Optics Condensed Matter::Materials Science Torsion pendulum clock Surface roughness engineering General Materials Science Thin film |
| Zdroj: | Journal of Low Temperature Physics. 126:557-562 |
| ISSN: | 0022-2291 |
| DOI: | 10.1023/a:1013767117903 |
| Popis: | We report on the design of a torsion pendulum that can resolve the mass loading from 5×10 17 3 He atoms (equivalent to a 1000A film) with a 0.1% resolution. The oscillator is fabricated from coin silver alloy, and the working surfaces are two highly polished coin silver discs, each with well-characterized surface roughness, that are diffusion welded together using a copper gasket. We report on the cell's temperature dependent background. The cell will be used to examine the evolution of the superfluid density and transition temperature as a function of film thickness as well as the normal fluid behavior. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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