Abstract
Synchrotron radiation x-ray diffraction measurement wasperformed to investigate the size effect in ferroelectric nanosized(Pb0.7Sr0.3)TiO3 particles with various sizes ranging from 10 to 200 nm. The 200 and 002 Braggreflections were separated using low energy synchrotron radiation x-rays. Thepeak profiles of the 002 reflections show a large broadening and asymmetry forall particle sizes compared with those of the 200 reflections. These anomalouslywide and asymmetric peak profiles become marked for peaks with a largel. The aspect ratio ofthe lattice constants c/a and the atomic distance between the anions and cations decrease gradually in the vicinityof the surface of the particles, indicating that the asymmetrical profiles can be attributedto the formation of a gradational system.
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