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Ferroelectrics Volume 538, 2019 - Issue 1: Proceedings of the Joint International 14th Russia/CIS/Baltic/Japan Symposium on Ferroelectricity (RCBJSF-2018), Part I of II
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SECTION B: Crystal Structure and Atomic Dynamics

Incommensurate instability and diffuse scattering at Brillouin zone boundary in Zr-rich lead zirconate titanate

D. A. AndronikovaIoffe Institute, St. Petersburg, Russia; Correspondence[email protected]
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Iu. A. BronwaldIoffe Institute, St. Petersburg, Russia; ;Institute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia; View further author information
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I. N. LeontievSouthern Federal University, Rostov-on-Don, Russia; View further author information
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N. G. LeontievAzov-Black Sea Engineering Institute, Don State Agrarian University, Rostov Oblast, Russian Federation; View further author information
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D. Yu. ChernyshovSwiss-Norwegian Beamlines at ESRF, Grenoble Cedex, FranceView further author information
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A. V. FilimonovInstitute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia; View further author information
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S. B. VakhrushevIoffe Institute, St. Petersburg, Russia; ;Institute of Physics, Nanotechnology and Telecommunications, Peter the Great St. Petersburg Polytechnic University, St. Petersburg, Russia; View further author information
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Pages 65-73 | Received 14 May 2018, Accepted 31 Oct 2018, Published online: 17 May 2019
 
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Abstract

Detailed study of the X-ray diffuse scattering in the paraelectric phase of the PbZr0.985Ti0.015O3 was carried out. We concentrated on the analysis of the scattering peculiarities in the vicinities of M- and R- points of the Brillouin zone. We have observed a critical increase of the diffuse scattering at the position Q ≈ (0.47 + h 0.53 + k l) slightly aside of M point on cooling to the intermediate phase. We attribute observed critical scattering to a mixed mode containing both oxygen octahedral tilts and antiparallel cationic displacements. Tentative conclusion is made describing earlier reported complicated set of the satellite peaks around M-point as the result of the soft-mode driven incommensurate phase transition.

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Funding

Filimonov A.V. and Andronikova D.A. acknowledge the support of Russian Foundation for Basic Research (Grant No.16-52-48016 and 17-02-00774). Andronikova D.A. also acknowledges the support of the Russian President Scholarship No. SP-3762.2018.5. Bronwald Iu.A. acknowledges the support of the Ministry of Science and Education of the Russian Federation, project no. 3.1150.2017/4.6.

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