Inertia of rough and vicinal surfaces of helium-4 crystals
| Autor: | J. Poitrenaud, Jay Amrit, P. Legros |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Materials science
Condensed matter physics business.industry media_common.quotation_subject Surface finish Condensed Matter Physics Inertia Atomic and Molecular Physics and Optics Optics Tilt (optics) Helium-4 General Materials Science Ultrasonic sensor Transmission coefficient business Isotopes of helium Vicinal media_common |
| Zdroj: | Journal of Low Temperature Physics. 101:971-981 |
| ISSN: | 1573-7357 0022-2291 |
| DOI: | 10.1007/bf00754518 |
| Popis: | This paper reports a study of the inertia of rough and vicinal of4He crystals. We have measured the transmission coefficient of ultrasonic waves at frequencies 10, 30, 50 and 70 MHz, across the liquid-solid interface. The experiments are carried out at temperatures ranging between 0.4 and 1.0 K for four crystallographic orientations. Two important phenomena are put to evidence for the first time. We have found the first experimental evidence that the inertia of rough surfaces depends on temperature. For vicinal surfaces, we have shown the strong increase of the inertia as the tilt angle decreases. Our experimental results agree very well with the theoretical predictions. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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