Temperature-stable giant dielectric response in orthorhombic samarium strontium nickelate ceramics
Temperature-stable giant dielectric response in orthorhombic samarium strontium nickelate ceramics
复制标题
正交晶系钐锶镍酸盐陶瓷中温度稳定的巨介电响应
DOI：
10.1063/1.3082034
复制
发表时间：
2009-03-01
影响因子：
3.2
通讯作者：
Zhu, Hai Yan
中科院分区：
文献类型：
--
作者：
Liu, Xiao Qiang;Wu, Yong Jun;Zhu, Hai Yan
The crystalline structure and dielectric properties of Sm1.5Sr0.5NiO4 ceramics are presented. The present ceramics is refined as orthorhombic Bmab phase and the orthorhombic strain may change the statue of charge ordering. The temperature-stable giant dielectric constant (∼100 000) with low dielectric loss of ∼0.1 is observed at frequency up to 5 MHz over a broad range of temperature (150–500 K) and frequency (100 kHz–5 MHz). The grain interior should be the dominative factor which contributes the giant dielectric response in the present ceramics after the equivalent circuit fitting, and the thermal activated small polaronic hopping related to the charge ordering is that factor. Compared to other giant dielectric materials, the present materials have a great potential in the practical application, especially for the high frequency application.
