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Investigation of a peculiar relaxor ferroelectric: Na0.5Bi0.5TiO3.
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UNSPECIFIED (2002) Investigation of a peculiar relaxor ferroelectric: Na0.5Bi0.5TiO3. In: 10th International Meeting on Ferroelectricity, MADRID, SPAIN, SEP 03-07, 2001. Published in: FERROELECTRICS, 270 pp. 1377-1382. ISSN 0015-0193.
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Abstract
The relaxor ferroelectric, Sodium Bismuth Titanate, (Na0.5Bi0.5TiO3), NBT is an A-site substituted distorted perovskite. An extensive temperature-, pressure- and substitution-dependent study of the crystal structure and phase transitions in this compound has been carried out using neutron/x-ray diffraction techniques. This has been complemented with optical, Raman and computational modelling studies.
The temperature-dependent investigation shows that NBT undergoes a first phase transition from the high-temperature cubic prototype (Pm (3) over bar m) Phase I to Phase II of tetragonal symmetry (P4bm) and then a second one with strong diffuse character to Phase III of rhombohedral symmetry (R3c). The high-pressure study of NBT has revealed an interesting and unusual relaxor-to-antiferroelectric (R3c --> Pnma) phase transition. Structural variations as a function of temperature and doping across the (Na1-xKx)(0.5)Bi0.5TiO3 (NKBT) series have also been established.
Item Type: | Conference Item (UNSPECIFIED) | ||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) Q Science > QC Physics |
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Journal or Publication Title: | FERROELECTRICS | ||||
Publisher: | TAYLOR & FRANCIS LTD | ||||
ISSN: | 0015-0193 | ||||
Official Date: | 2002 | ||||
Dates: |
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Volume: | 270 | ||||
Number of Pages: | 6 | ||||
Page Range: | pp. 1377-1382 | ||||
Publication Status: | Published | ||||
Title of Event: | 10th International Meeting on Ferroelectricity | ||||
Location of Event: | MADRID, SPAIN | ||||
Date(s) of Event: | SEP 03-07, 2001 |
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