This work focuses on the crystal symmetry of morphotropic PbZrx Ti1-x O3 (PZT). The crystal symmetry is investigated within single domains of ≈30-100nm width by convergent beam electron diffraction (CBED). The composition PbZr0.54 Ti0.46 O3 was chosen for experiments at room temperature and ≈300°C. The observed zone axis symmetry at room temperature was a (1̄ 10) mirror in some domains whereas symmetry was broken in neighboring domains. Therefore the highest crystal symmetry that can be attributed with certainty to the probed volume is monoclinic. The local symmetry of single cells might be lower due to disordered displacements of the cations. At ≈300°C the zone axis symmetry had changed to a (100) pc mirror that only occurs in the tetragonal phase of PZT.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|Publication status||Published - 2008 Jul 29|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics