TY - JOUR
T1 - Influence of Co doping on structural, optical and magnetic properties of BiFeO 3 films deposited on quartz substrates by sol-gel method
AU - Peng, Lin
AU - Deng, Hongmei
AU - Tian, Jianjun
AU - Ren, Qing
AU - Peng, Cheng
AU - Huang, Zhipeng
AU - Yang, Pingxiong
AU - Chu, Junhao
PY - 2013
Y1 - 2013
N2 - Multiferroic BiFe 1-x Co x O 3 (x = 0, 0.03, 0.05, 0.1) thin films have been prepared on quartz substrates using a sol-gel technique. X-ray diffraction data confirms that Co atoms have been successfully incorporated into the host lattice. The scanning electron microscopy (SEM) exhibits that the surface morphologies of BiFe 0.97 Co 0.03 O 3 and BiFe 0.95 Co 0.05 O 3 thin films become more compact and uniform. With increasing Co dopant, the position of A 1 -1 and E-4 modes shift towards the lower wavenumber indicates that Co doping induces structural distortion of BiFeO 3 . With increasing Co composition, the fundamental absorption edges of BiFe 1-x Co x O 3 films show red shift. Furthermore, transmittance spectra demonstrates that the optical band gap of BiFe 1-x Co x O 3 films decreases from 2.66 eV to 2.53 eV with the increase of Co from x = 0 to 0.1. At the wavelength of 720 nm, the refractive index decreases and the extinction coefficient increases with increasing the amount of Co. Optical properties reveal that Co doping in BiFeO 3 provides preliminary research for optoelectronic devices and infrared detectors. Compared with BiFeO 3 prepared under similar conditions, the remanent magnetization M r of BiFe 1-x Co x O 3 (x = 0.03, 0.05, 0.1) thin films significantly enhanced, which provides potential applications in information storage.
AB - Multiferroic BiFe 1-x Co x O 3 (x = 0, 0.03, 0.05, 0.1) thin films have been prepared on quartz substrates using a sol-gel technique. X-ray diffraction data confirms that Co atoms have been successfully incorporated into the host lattice. The scanning electron microscopy (SEM) exhibits that the surface morphologies of BiFe 0.97 Co 0.03 O 3 and BiFe 0.95 Co 0.05 O 3 thin films become more compact and uniform. With increasing Co dopant, the position of A 1 -1 and E-4 modes shift towards the lower wavenumber indicates that Co doping induces structural distortion of BiFeO 3 . With increasing Co composition, the fundamental absorption edges of BiFe 1-x Co x O 3 films show red shift. Furthermore, transmittance spectra demonstrates that the optical band gap of BiFe 1-x Co x O 3 films decreases from 2.66 eV to 2.53 eV with the increase of Co from x = 0 to 0.1. At the wavelength of 720 nm, the refractive index decreases and the extinction coefficient increases with increasing the amount of Co. Optical properties reveal that Co doping in BiFeO 3 provides preliminary research for optoelectronic devices and infrared detectors. Compared with BiFeO 3 prepared under similar conditions, the remanent magnetization M r of BiFe 1-x Co x O 3 (x = 0.03, 0.05, 0.1) thin films significantly enhanced, which provides potential applications in information storage.
KW - Co doping
KW - Optical and magnetic properties
UR - https://www.scopus.com/pages/publications/84875418502
U2 - 10.1016/j.apsusc.2012.11.176
DO - 10.1016/j.apsusc.2012.11.176
M3 - 文章
AN - SCOPUS:84875418502
SN - 0169-4332
VL - 268
SP - 146
EP - 150
JO - Applied Surface Science
JF - Applied Surface Science
ER -