Pre-transitional evolution of central peaks and transverse acoustic phonon branch in single crystal lead zirconate titanate with Ti concentration 0.7%

18th International Conference PhysicA.SPb

Andronikova, D.A.^1,2 ; Bronwald, I.A.^1,2 ; Burkovsky, R.G.^2 ; Leontiev, I.N.^3 ; Leontiev, N.G.^4 ; Bosak, A.A.^5 ; Filimonov, A.V.^2 ; Vakhrushev, S.B.^1,2,6

Ioffe Institute, 26 Politekhnicheskaya, St-Petersburg

194021, Russia^1

Peter the Great St.Petersburg Polytechnic University, 29 Polytechnicheskaya, St.Petersburg

195251, Russia^2

Southern Federal University, ul. Bolshaya Sadovaya 105/42, Rostov-on-Don

344006, Russia^3

AzovBlack Sea Engineering Institute, Don State Agrarian University, ul. Lenina 21, Zernograd, Rostov oblast

347740, Russia^4

European Synchrotron Radiation Facility, BP 220, Grenoble Cedex

F-38043, France^5

Faculty of Physics, Saint-Petersburg State University, Ulyanovskaya str.,1, Petrodvorets, Saint-Petersburg

198504, Russia^6

关键词: Acoustic phonons;    Ferroelectric modes;    Ferroelectric phase;    Inelastic X ray scattering;    Phonon branches;    Temperature dependent;    Temperature evolution;    Transverse acoustic phonons;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/769/1/012070/pdf
DOI  :  10.1088/1742-6596/769/1/012070

来源: IOP

【 摘 要 】

Inelastic X-ray scattering measurements have been done to study the lattice dynamics in lead zirconate titanate solid solution with 0.7% of PbTiO3. The temperature evolution of central peak and low-energy transverse phonon branches has been traced. Temperature dependent in-plane transverse polarized acoustic phonon branch indirection has been revealed. The central peaks of two types have been found. The central peak at small wave vectors can be attributed to the relaxational-type soft ferroelectric mode, while the latter at Q = (1.5 -0.5 0) could be linked to the formation of M-superstructure in the intermediate ferroelectric phase.