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Details for article 3 of 5 found articles
| Title: |
Hypersonic anomaly of Beta-BaB2O4 single crystal |
| Author: |
Tu, C. S. Katiyar, Ram S. Chen, C. H. |
| Appeared in: |
Ferroelectrics letters section |
| Paging: | Volume 27 (2000) nr. 3-4 pages 75-81 |
| Year: |
2000-04-01 |
| Contents: |
The Brillouin light back-scattering spectra along the [001] phonon direction have been measured as a function of temperature (25-960 °C) for a BetaBaB2O4 (BBO) single crystal. As temperature increases, the longitudinal acoustic (LA) phonon frequency of BBO shows an obvious softening with a weak modification of slope near 500 °C. We propose that the structural transition (α-phase→β-phase) of BBO occurs near 500 °C and is first-order type. In addition, a broad damping evolution was observed and can be attributed to the dynamic order-parameter fluctuations. With the previous result, the LA[001] sound velocity VLA was also calculated at room temperature. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 3 of 5 found articles
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