Pressure dependence of optical absorption in PbTiO3to 35 GPa: Observation of the tetragonal‐to‐cubic phase transition
| Autor: | Andrey G. Kalinichev, C. T.A. Suchicital, Jay D. Bass, David A. Payne, C. S. Zha |
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| Rok vydání: | 1992 |
| Předmět: |
chemistry.chemical_classification
Phase transition Condensed matter physics business.industry Chemistry Hydrostatic pressure General Physics and Astronomy Spectral line Tetragonal crystal system Optics Absorption edge sense organs business Absorption (electromagnetic radiation) Single crystal Inorganic compound |
| Zdroj: | Journal of Applied Physics. 72:3705-3707 |
| ISSN: | 1089-7550 0021-8979 |
| Popis: | Optical absorption of the polar material PbTiO3 has been studied up to 35 GPa (350 kbar) in the visible range of wavelengths using a single crystal samples compressed in a diamond anvil high pressure cell. The absorption edge shifts toward lower energies with increasing pressure. Pressure dependence of the absorption edge undergoes significant changes at about 11.5±0.3 GPa, close to the previously identified tetragonal‐cubic phase transition. The change in pressure dependence of the spectra is consistent with second‐order character of the transition. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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