红外与毫米波学报, 2016, 35 (3): 322, 网络出版: 2016-07-26
Ce和Ni共掺杂BiFeO3薄膜的光学和铁磁性能
AInfluence of Ce and Ni co-doping on structural, optical and magnetic properties of BiFeO3 thin films
摘要
利用溶胶-凝胶工艺在石英衬底上制备了镍铈共掺杂铁酸铋Bi0.9Ce0.1Fe1-xNixO3(xBCFNO, x=0, 0.03, 0.05, 0.07)薄膜.X-射线衍射(XRD) 测试表明所有样品的晶体结构都为四方钙钛矿铁酸铋BiFeO3 结构.由于Ce和Ni共掺杂,XRD显示,峰位置发生偏移.主峰(012/110)峰值在Ni含量x=0.05时峰值最大.扫描电子显微镜(SEM)测试也显示x=0.05时晶粒最大,结晶度最好.光学透射测试显示xBCFNO 薄膜x=0.03时的光学禁带宽度最小,为2.14 eV.铁磁测试结果表明镍铈共掺杂可以进一步提高铁酸铋的室温铁磁性.
Abstract
Bi0.9Ce0.1Fe1-xNixO3(xBCFNO, x=0, 0.03, 0.05, 0.07)thin films were fabricated on SiO2 substrates by sol-gel process.X-ray diffraction patterns indicate that all films exhibit a distorted pseudo-tetragonal perovskite structure with a high degree of (012/110) preferred orientation and peak position deviation. The intensity of(012/110)peak changes with the change of x with a maximum value at x=0.05. Furthermore, the grain size become the biggest at x=0.05 revealed by scanning electron microscopy (SEM). The smallest band gap of xBCFNO films is 2.14 eV at x=0.03 measured by the optical transmission spectra. The magnetic hysteresis (M-H) loops show that the room-temperature ferromagnetism was enhanced with Ce and Ni co-doping.
崔金玉, 杨平雄, 褚君浩. Ce和Ni共掺杂BiFeO3薄膜的光学和铁磁性能[J]. 红外与毫米波学报, 2016, 35(3): 322. CUI Jin-Yu, YANG Ping-Xiong, CHU Jun-Hao. AInfluence of Ce and Ni co-doping on structural, optical and magnetic properties of BiFeO3 thin films[J]. Journal of Infrared and Millimeter Waves, 2016, 35(3): 322.