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The origin of the structural phase transition in Gd 2 (MoO 4 ) 3
Author(s) -
Dvořák V.
Publication year - 1971
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220450115
Subject(s) - symmetry (geometry) , crystallography , phase transition , phase (matter) , chemistry , base (topology) , materials science , condensed matter physics , physics , mathematics , geometry , mathematical analysis , organic chemistry
The phase transition in Gd 2 (MoO 4 ) 3 at 159 °C is investigated on the base of symmetry changes using standard group‐theoretical methods. It is shown that a two‐dimensional representation exists with k = 1/2 ( b 1 + b 2 ) which induces a symmetry change from D 2 3 d to C 2 8 v and could be responsible for the phase transition. The appropriate form of the free energy is developed and compared with that proposed by Levanyuk and Sannikov [1].