Influence of KF substitution on the ferroelectric phase transition of lead titanate single crystals studied by Brillouin light scattering

作     者：Seonhyeop Shin Jae-Hyeon Ko Shinya Tsukada Yukikuni Akishige Krystian Roleder Daniel Rytz 

作者机构：Department of PhysicsHallym UniversityHallymdaehakgil 39 ChuncheonGangwondo 200-702Republic of Korea Faculty of EducationShimane University Matsue-ShiShimane 690-8504Japan Institute of PhysicsUniversity of Silesia ulica Uniwersytecka 4PL-40-007 KatowicePoland Forschungsinstitut für mineralische und metallische Werkstoffe Edelsteine/Edelmetalle GmbH(FEE)Struthstraβe 2D-55743 Idar-ObersteinGermany 

出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)

年 卷 期：2015年第5卷第2期

页      面：47-52页

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 070301[理学-无机化学] 0702[理学-物理学] 

基　　金：supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education,Science and Technology(Grant No.2013R1A1A2006582) JSPS KAKENHI(Grant No.26790040 and 25400329) 

主　　题：Lead titanate KF-substitution elastic property Brillouin scattering 

摘      要：The elastic properties of KF-substituted perovskite lead titanate(PbTiO_(3))were investigated by dielectric measurements and Brillouin light *** ferroelectric phase transition occurred at substantially lower temperature due to KF substitution,which was attributed to the modification of the covalency in Pb–O and Ti–O *** longitudinal acoustic(LA)mode of KF-substituted PbTiO_(3) showed a frequency softening in the paraelectric phase,which was accompanied by increasing acoustic *** indicated that polarization fluctuations responsible for the acoustic anomalies were enhanced by KF substitution.