Low frequency elastic properties of neutron-irradiated quartz. Comparison with glasses
| Autor: | I. Rohr, J. Classen, Christian Enss, S. Hunklinger, Christiane Laermans |
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| Rok vydání: | 1999 |
| Předmět: |
Materials science
Solid-state physics business.industry Low frequency Condensed Matter Physics Condensed Matter::Disordered Systems and Neural Networks Molecular physics Internal friction Electronic Optical and Magnetic Materials Optics Neutron Irradiation Elasticity (economics) business Quartz Quantum tunnelling |
| Zdroj: | The European Physical Journal B. 10:623-633 |
| ISSN: | 1434-6028 |
| DOI: | 10.1007/s100510050894 |
| Popis: | Neutron-irradiated quartz is a promising model system to learn more about the low-energy excitations (tunneling states) in vitreous silica and in similar glasses. We present the first systematic study of the elastic properties of neutron-irradiated quartz at low frequencies and very low temperatures. Using the vibrating reed technique at frequencies of several kHz we have measured the sound velocity and internal friction of six quartz crystals irradiated with different neutron doses over a wide range of temperatures (7 mK-300 K). The results are analyzed using the tunneling model and several extensions of this theory. Comparisons are made with recent low-frequency measurements on normal and compacted vitreous silica and with ultrasound experiments on neutron-irradiated quartz. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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