Cation ratio and ferroelectric properties of TbMnO3 epitaxial films grown by pulsed laser deposition

被引：8
作者：
Shimamoto, K. [1 ]
Dobeli, M. [2 ]
Lippert, T. [1 ,3 ]
Schneider, C. W. [1 ]
机构：
[1] Paul Scherrer Inst, Energy & Environm Res Div, CH-5232 Villigen, Switzerland
[2] ETH, Lab Ion Beam Phys, CH-8093 Zurich, Switzerland
[3] ETH, Dept Chem & Appl Biosci, Inorgan Chem Lab, CH-8093 Zurich, Switzerland
来源：
JOURNAL OF APPLIED PHYSICS | 2016年 / 119卷 / 18期
关键词：
THIN-FILMS; RELAXOR FERROELECTRICS; STOICHIOMETRY; EVAPORATION; ABLATION; QUALITY; PHASE;
D O I：
10.1063/1.4948961
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The cation ratio, crystal structure, and ferroelectric properties of TbMnO3 films on ( 010) oriented YAlO3 substrates grown by pulsed laser deposition were investigated. We found that the cation ratio is altered by the background gas pressure, and that stoichiometric films have larger critical thicknesses than Tb-rich films. The ferroelectric order was severely disturbed in Tb-rich films showing a lower transition temperature and a smaller polarization. In addition, frequency dispersion was observed in the dielectric response of relaxed stoichiometric TbMnO3 films, which may be introduced by defects due to strain relaxation. Published by AIP Publishing.
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页数：5
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