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Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK)

Changsha,China,10.16-10.18,2010

ISBN: 978-1-935068-41-9 Scientific Research Publishing, USA

E-Book 2313pp Pub. Date: October 2010

Category: Chemistry & Materials Science

Price: $360

Title: Symmetry and Order Parameter of Antiferroelectric PbHfO3
Source: Proceedings of the 7th National Conference on Functional Materials and Applications (FMA 2010 E-BOOK) (pp 304-306)
Author(s): Dai-zhao Han, Dept of Basic Courses, Ordnance Engineering College, Shijiazhuang, China.
Su-min Ma, Dept of Foreign Language Teaching, Hebei University of Economics and Business, Shijiazhuang, China
Yu-ping Cai, Dept of Basic Courses, Ordnance Engineering College, Shijiazhuang, China.
Yu-jie Li, Dept of Basic Courses, Ordnance Engineering College, Shijiazhuang, China.
Hong-ye Chen, Dept of Basic Courses, Ordnance Engineering College, Shijiazhuang, China.
Abstract: On the bases of the result of X-ray diffraction at room temperature, the structure of antiferroelectric PbHfO3 has been studied in detail. For the paraelectric-antiferroelectric phase transition at 873K, the symmetry of antiferroelectric PbHfO3 is P2/m（C2i）. An axial vector R is selected as the order parameter to reflect the change of symmetry in antiferroelectric phase transition. According to Curie principle, the satisfying results are obtained relative to the change of symmetry group in the phase transition.
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