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Synchrotron topography of phase transitions in perovskite-like crystals
| Content Provider | Scilit |
|---|---|
| Author | Dudley, M. Yao, G. -D |
| Copyright Year | 1993 |
| Description | Journal: Journal of Physics D: Applied Physics In situ observations have been made of the first-order phase transition occurring at approximately 145 degrees C in a large $LaGaO_{3}$ single crystal, and the second-order phase transition occurring at approximately 435 degrees C in a large $LaAlO_{3}$ single crystal, using synchrotron white beam X-ray diffraction topography. In the case of $LaGaO_{3}$, the high-temperature rhombohedral phase reflections gradually replace the low-temperature orthorhombic reflections as the transition temperature is approached. In the case of $LaAlO_{3}$, the magnitude of this image shift continuously decreased in magnitude as the temperature approaches the transition point, which along with the gradual distortion of the diffraction pattern, confirms the second-order nature of this transition. As the transition is surpassed, twinning completely disappears in the crystal, as expected, since the twin planes in the rhombohedral phase become mirror planes in the cubic phase. |
| Related Links | http://iopscience.iop.org/article/10.1088/0022-3727/26/4A/026/pdf |
| Ending Page | A125 |
| Page Count | 6 |
| Starting Page | A120 |
| ISSN | 00223727 |
| e-ISSN | 13616463 |
| DOI | 10.1088/0022-3727/26/4a/026 |
| Journal | Journal of Physics D: Applied Physics |
| Issue Number | 4A |
| Volume Number | 26 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 1993-04-14 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics D: Applied Physics X Ray Diffraction First Order Phase Transition |
| Content Type | Text |
| Resource Type | Article |
| Subject | Surfaces, Coatings and Films Acoustics and Ultrasonics Condensed Matter Physics Electronic, Optical and Magnetic Materials |
