Oxygen-vacancy-related high-temperature dielectric relaxation in SrTiO3 ceramics

被引：88

作者：

Wang, Xiaofei ^{[1
]}

Lu, Xiaomei ^{[1
]}

Zhang, Chao ^{[1
]}

Wu, Xiaobo ^{[1
]}

Cai, Wei ^{[1
]}

Peng, Song ^{[1
]}

Bo, Huifeng ^{[1
]}

Kan, Yi ^{[1
]}

Huang, Fengzhen ^{[1
]}

Zhu, Jinsong ^{[1
]}

机构：

[1] Nanjing Univ, Dept Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2010年 / 107卷 / 11期

基金：

美国国家科学基金会;

关键词：

ceramics; crystal structure; dielectric losses; dielectric materials; dielectric relaxation; strontium compounds; vacancies (crystal); THIN-FILMS; 65; K; FERROELECTRICS; ANOMALIES; TITANATE; NONLINEARITY; ZRO2;

D O I：

10.1063/1.3430987

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Quantum paraelectric SrTiO3 has resulted in many investigations because of the anomalous properties. Here, using the conventional solid-state reaction method, we fabricated polycrystalline SrTiO3 ceramics with pure cubic perovskite structure. A dielectric loss peak is observed at around 450 K and 100 Hz and it shifts to higher temperature with increasing frequency. The typical high-temperature dielectric relaxation process is confirmed to be related to the oxygen vacancies (OVs) inside ceramics. More interestingly, a Cole-Cole fitting to loss peaks reveals a weaker correlation among OVs for such dielectric materials compared with that of ferroelectrics. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3430987]

引用

页数：4

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