Abstract:
The 108 dissymmetric phases were obtained as a result of XX anions ordering in elpasolite structure A2BB′X6 (ordered perovskite) using group theoretical methods. The critical order parameters which transform according to the irreducible representations of Γ and X points of Brillouin zone of O5h— Fmˉ3m space group were considered only. Polyhedral structures showed for dissymmetric phases which are accompanied by appearing of ferroelectricity at phase transition. All results are summarized in convenient tables.
Keywords:
elpasolite, structural data, a complete condensate of order parameters, irreducible representations, critical distortion, phase transition, dissymmetric phases.
The research is conducted within the framework of the state task of Ministry of Education and Science of the Russian Federation to Siberian Federal University on R&D performance in 2015 (Task 3.2534.2015/K).
Received: 23.11.2015 Received in revised form: 09.12.2015 Accepted: 20.01.2016
Bibliographic databases:
Document Type:
Article
UDC:
548.1:537.226.4
Language: English
Citation:
Roman G. Sevryukov, Ivan N. Safonov, Maksim S. Molokeev, Sergey V. Misjul, “Phases of anionic ordering in elpasolite structures (ordered perovskites)”, J. Sib. Fed. Univ. Math. Phys., 9:1 (2016), 108–118
This publication is cited in the following 2 articles:
S. V. Pavlov, “Phenomenological Models of Phase Transitions with Multicomponent Interacting
Order Parameters: Construction and Classification by Methods of Singularity Theoryy”, VMU, 2024, no. №3_2024, 2430501–1
S. V. Pavlov, “Phenomenological Models of Phase Transitions with Multicomponent Interacting Order Parameters: Construction and Classification by Methods of Singularity Theory”, Moscow Univ. Phys., 79:3 (2024), 369