Sequence of phase transitions in PbHfO{sub 3}
Journal Article
·
· Crystallography Reports
- 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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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
CUBIC LATTICES
FERROELECTRIC MATERIALS
HAFNIUM COMPOUNDS
LEAD COMPOUNDS
NIOBATES
ORTHORHOMBIC LATTICES
OXIDES
PHASE TRANSFORMATIONS
POTASSIUM COMPOUNDS
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TETRAGONAL LATTICES
TITANATES
X-RAY DIFFRACTION
ZIRCONATES
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
CUBIC LATTICES
FERROELECTRIC MATERIALS
HAFNIUM COMPOUNDS
LEAD COMPOUNDS
NIOBATES
ORTHORHOMBIC LATTICES
OXIDES
PHASE TRANSFORMATIONS
POTASSIUM COMPOUNDS
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
TETRAGONAL LATTICES
TITANATES
X-RAY DIFFRACTION
ZIRCONATES