Title : ( Room Temperature Magnetization of Co-doped TiO2Thin Films Prepared by Spray Pyrolysis Technique )
Authors: Masoud Karimipour , M. Magetod , Nasser Shahtahmassebi , Mahmood Rezaee Roknabadi , R. Etefagh , Elahe Azhir , M. Mwamburi , Z. Topalian , P. Svedlindh ,
دانلود فایل برای اعضای دانشگاهAccess to full-text not allowed by authors
Abstract
The influence of Co concentration (x) on the structural, magneto-optical properties of CoxTi1-xO2 films has been investigated. The films were deposited by spray pyrolysis technique on Si(100) substrates at 475˚C using a hydro-alcoholic solution containing of titanium (iv) isopropoxide and Co(NO3)2 with various Co-doping levels of x=0, 0.003, 0.008, and 0.015. The effect of annealing atmosphere on structural and electronic structure of the films was investigated. X-ray diffraction analysis shows that the films have pure phase of TiO2. Atomic force microscope (AFM) study shows that the annealing does not change significantly the grain size and microstructure of the samples. Room temperature magneto-optical characterization in polar mode shows hysteresis loops for the samples annealed in H2 gas as well as a paramagnetic behaviour for the samples which were annealed in air. X-ray photoelectron spectroscopy (XPS) analysis shows the presence of Co2+ high spin for sample with x=0.008 which annealed in H2. It shows that Co atoms are bounded to oxygen and there is no metallic bound in anatase structure. Therefore, the origin of magnetization could be attributed to the role of oxygen vacancies in anatase thin films.
Keywords
, Diluted magnetic semiconductors; Grazing incident angle of X, Ray diffraction; Magneto, optical Kerr effect
@inproceedings{paperid:1031067,
author = {Karimipour, Masoud and M. Magetod and Shahtahmassebi, Nasser and Rezaee Roknabadi, Mahmood and R. Etefagh and Azhir, Elahe and M. Mwamburi and Z. Topalian and P. Svedlindh},
title = {Room Temperature Magnetization of Co-doped TiO2Thin Films Prepared by Spray Pyrolysis Technique},
booktitle = {Proceedings of the 4th International Conference onNanostructures (ICNS4)},
year = {2012},
location = {kish, IRAN},
keywords = {Diluted magnetic semiconductors; Grazing incident angle
of X-Ray diffraction; Magneto-optical Kerr effect},
}
%0 Conference Proceedings
%T Room Temperature Magnetization of Co-doped TiO2Thin Films Prepared by Spray Pyrolysis Technique
%A Karimipour, Masoud
%A M. Magetod
%A Shahtahmassebi, Nasser
%A Rezaee Roknabadi, Mahmood
%A R. Etefagh
%A Azhir, Elahe
%A M. Mwamburi
%A Z. Topalian
%A P. Svedlindh
%J Proceedings of the 4th International Conference onNanostructures (ICNS4)
%D 2012
