期刊
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
卷 55, 期 2, 页码 255-260出版社
SPRINGER
DOI: 10.1007/s10971-010-2242-5
关键词
Nanoparticle; Structure; Raman spectra; Impedance spectroscopy
资金
- National Foundation for Science and Technology Development (NAFOSTED) of Vietnam [103.06.14]
We investigate effects of Fe dopant concentration on the structure, as well as low temperature Raman scattering and electrical transport properties in SrTi1-x Fe (x) O-3 (x = 0.00, 0.10, 0.20, 0.30, 0.40) nanoparticles prepared by sol-gel method. The results show an average particle size of powder is about 30 nm, and the lattice parameters decrease as increasing the Fe content. In the Raman spectra, a broad structure in the region 200-500 cm(-1) is almost absent and the peaks in the region 600-800 cm(-1) show different weights with respect to SrTiO3, relating to structural changes with increasing dopant concentration in conjunction with increasing grain boundary contribution to the impedance. The abrupt change in Raman peak position as function of temperature suggests a phase transition in our samples in the range of 110-150 K. These results indicate that the Fe ion has replaced the site of Ti in unit cell. These results also demonstrate the feasibility of synthesizing the compound with low annealing temperature.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据