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

被引：2
|
作者：
Andronikova, D. A. [1 ]
Bronwald, Iu. A. [1 ,2 ]
Leontiev, I. N. [3 ]
Leontiev, N. G. [4 ]
Chernyshov, D. Yu. [5 ]
Filimonov, A. V. [2 ]
Vakhrushev, S. B. [1 ,2 ]
机构：
[1] Ioffe Inst, St Petersburg, Russia
[2] Peter Great St Petersburg Polytech Univ, Inst Phys Nanotechnol & Telecommun, St Petersburg, Russia
[3] Southern Fed Univ, Rostov Na Donu, Russia
[4] Don State Agr Univ, Azov Black Sea Engn Inst, Rostov Na Donu, Rostov Oblast, Russia
[5] ESRF, Swiss Norwegian Beamlines, Grenoble, France
来源：
FERROELECTRICS | 2019年 / 538卷 / 01期
基金：
俄罗斯基础研究基金会;
关键词：
Ferroelectricity; phase transitions; diffuse scattering; PHASE-TRANSITIONS; FERROELECTRIC PHASE; PBZRO3;
D O I：
10.1080/00150193.2019.1569987
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 approximate to (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.
引用
收藏
页码：65 / 73
页数：9
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