Structural Peculiarities of the Intermediate Phase in Zr-Rich Lead Zirconate Titanate

• Published in: Physics of the solid state Vol. 61; no. 10; pp. 1772 - 1778
• Main Authors: Andronikova, D. A., Bronwald, I. A., Leontyev, N. G., Leontyev, I. N., Chernyshov, D. Yu, Filimonov, A. V., Vakhrushev, S. B.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.10.2019; Springer; Springer Nature B.V
• Subjects: Antiphase boundaries; BRAGG CURVE; BRAGG REFLECTION; CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRYSTAL STRUCTURE; Diffraction; FERROELECTRIC MATERIALS; Ferroelectricity; LEAD COMPOUNDS; Lead zirconate titanates; MONOCRYSTALS; PHASE TRANSFORMATIONS; Physics; Physics and Astronomy; Satellite observation; Single crystals; Solid State Physics; Superstructures; TITANATES; X-RAY DIFFRACTION; X-rays; ZIRCONATES; Zirconium; ferroelectrics; phase transitions; X-ray scattering; and crystal structure; perovskite structure
• ISSN: 1063-7834; 1090-6460
• DOI: 10.1134/S1063783419100056

This paper presents the results of X-ray diffraction studies on a single crystal of lead zirconate titanate PbZr 0.993 Ti 0.007 O 3 in the region of existence of an intermediate ferroelectric phase. In addition to the known superstructure reflections of the M type q M = and the first-order satellite reflections q M + {δ, δ, δ}, unknown second-order satellites have been observed near q M and near the Bragg reflections. Structural model of regular system of antiphase domains is used for diffraction calculation. The model is shown to describe the first- and second-orders satellite reflections in the vicinity of q M , but it cannot explain the appearance of satellites around the main Bragg peaks. A possible origin of the system of the superstructures observed in the intermediate phase is discussed.