Ferroelectric Superlattice Based on Barium-Strontium Titanate Solid Solutions

被引：4
|
作者：
Razumnaya, A. G. [1 ,2 ]
Golovko, Yu. I. [3 ]
Lyanguzov, N. V. [1 ]
Yuzyuk, Yu. I. [1 ]
Shirokov, V. B. [1 ,3 ]
Mukhortov, V. M. [1 ,3 ]
El Marssi, M. [2 ]
机构：
[1] Southern Fed Univ, Rostov Na Donu 344006, Russia
[2] Univ Picardie Jules Verne, Phys Mat Condensee Lab, F-80039 Amiens, France
[3] Russian Acad Sci, Southern Sci Ctr, Rostov Na Donu 344006, Russia
来源：
PHYSICS OF THE SOLID STATE | 2015年 / 57卷 / 11期
基金：
俄罗斯科学基金会; 俄罗斯基础研究基金会;
关键词：
BATIO3/(BA; SR)TIO3; SUPERLATTICES; RAMAN-SPECTROSCOPY; PHASE-TRANSITIONS; DEPENDENCE;
D O I：
10.1134/S1063783415110281
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A superlattice of the composition Ba0.8Sr0.2TiO3/Ba0.4Sr0.6TiO3 has been grown by rf cathode sputtering on a MgO(001) substrate. The unit cell parameters of the superlattice layers along the normal to the substrate, modulation period, and orientation relationships between the film and the substrate have been determined using X-ray diffraction. Based on the temperature dependences of the polarized Raman spectra, it has been revealed that the frequency of soft mode E(TO) increases from 79 to 97 cm(-1) in the temperature range of 80-350 K. It has been found that there are no characteristic indications of a sequence of phase transitions, which take place in bulk samples of barium-strontium titanate solid solutions of identical compositions, and the transition from the ferroelectric to paraelectric phase in the superlattice occurs at a temperature of similar to 350 K.
引用
收藏
页码：2246 / 2251
页数：6
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