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Sequence of phase transitions in PbHfO{sub 3}

Journal Article · · Crystallography Reports
; ;  [1]
  1. Southern Federal University (Russian Federation)
The temperature changes in the PbHfO{sub 3} structure in the temperature range of 20 < t < 400 Degree-Sign C have been studied by X-ray powder diffraction. The sequence of phase changes with an increase in temperature was found to be as follows: orthorhombic phase Pbam (O1), orthorhombic phase C2mm (O2), tetragonal phase P4mm (T), and cubic phase Pm3m (C). The C2mm and P4mm phases are ferroelectric, which is confirmed by measuring the dependences {epsilon}(t). The similarity of the transition pattern obtained with the known transition sequences for ferroelectric (barium titanate, potassium niobate, and lead titanate) and antiferroelectric (lead zirconate) oxides is analyzed.
OSTI ID:
22054189
Journal Information:
Crystallography Reports, Journal Name: Crystallography Reports Journal Issue: 2 Vol. 57; ISSN 1063-7745; ISSN CYSTE3
Country of Publication:
United States
Language:
English

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