The phase transition in PrGa0.95Mg0.05O3 at elevated temperatures |
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| Authors: | Zhiguo Liu Ze Xiang Shen Zhenhua Ni Lei Liu Xiqiang Huang Zhe Lü Yu Sui Wenhui Su |
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| Affiliation: | 1. Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150080, China;2. Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637616, Singapore;3. Department of Physics, Faculty of Science, National University of Singapore, Singapore 117542, Singapore;4. International Center for Materials Physics, Chinese Academy of Science, Shenyang 110015, China |
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| Abstract: | PrGa0.95Mg0.05O3 was synthesized by a standard solid-state technique, having an orthorhombic structure determined from X-ray diffraction (XRD) data at room temperature. At high temperature, an inflection is found on the Ln σT vs. 1/T curve at about 550 °C. The inflection can also be observed on thermal expansion vs. temperature curve at about 530 °C. Furthermore, the number of Raman modes between 200 and 400 cm?1 decreases and the peak at about 190 cm?1 weakens at about 450 °C. The results indicate a structural transition from orthorhombic to tetrahedral or rhombohedral. |
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