Lattice dynamics in the paraelectric phase of PbHfO3 studied by inelastic x-ray scattering

被引：17

作者：

Burkovsky, R. G. ^{[1
,2
]}

Andronikova, D. ^{[2
]}

Bronwald, Yu ^{[3
]}

Krisch, M. ^{[1
]}

Roleder, K. ^{[4
]}

Majchrowski, A. ^{[5
]}

Filimonov, A. V. ^{[2
]}

Rudskoy, A. I. ^{[2
]}

Vakhrushev, S. B. ^{[3
]}

机构：

[1] European Synchrotron Radiat Facil, F-38000 Grenoble, France

[2] Peter Great St Petersburg Polytech Univ, St Petersburg 195251, Russia

[3] AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[4] Silesian Univ, Inst Phys, PL-40007 Katowice, Poland

[5] Mil Univ Technol, Inst Appl Phys, PL-00908 Warsaw, Poland

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2015年 / 27卷 / 33期

关键词：

antiferroelectric; lead hafnate; PbHfO3; phonon; inelastic scattering; IXS; single crystal; TEMPERATURE-DEPENDENCE; NEUTRON-SCATTERING; TRANSITIONS; PBZRO3; PHONONS; MODE;

D O I：

10.1088/0953-8984/27/33/335901

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We report the results of an inelastic x-ray scattering study of the lattice dynamics in the paraelectric phase of the antiferroelectric lead hafnate PbHfO3. The study reveals an avoided crossing between the transverse acoustic and transverse optic phonon modes propagating along the [1 1 0] direction with [1 - 1 0] polarization. The static susceptibility with respect to the generally incommensurate modulations is shown to increase on cooling for the entire Gamma-M direction. We consider different approaches to the data analysis that correspond to different models for the temperature evolution of the dynamic susceptibility function. A number of similarities and differences between the lattice dynamics of PbHfO3 and PbZrO3 are described.

引用

页数：13

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