Effects of oxygen vacancy on the electronic structure and multiferroics in sol–gel derived Pb0.8Co0.2TiO3 thin films

Hanqing Zhao; Jiaou Wang; Linxing Zhang; Yangchun Rong; Jun Chen; Kurash Ibrahim; Xianran Xing

doi:10.1039/C3DT50257K

Effects of oxygen vacancy on the electronic structure and multiferroics in sol–gel derived Pb_0.8Co_0.2TiO₃ thin films

Hanqing Zhao,^a Jiaou Wang,^b Linxing Zhang,^a Yangchun Rong,^a Jun Chen,^a Kurash Ibrahim^b and Xianran Xing*^a

* Corresponding authors

^a Department of Physical Chemistry, State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, P. R. China
E-mail: xing@ustb.edu.cn
Fax: +86-10-62332525
Tel: +86-10-62334200

^b Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, the Chinese Academy of Sciences, Beijing 100049, P. R. China

Abstract

The single phase Pb_0.8Co_0.2TiO₃ thin films were synthesized on a Pt/Ti/SiO₂/Si substrate by the sol–gel route. The present films exhibited homogeneous microstructure with low porosity. O 1s X-ray photoelectron spectroscopy (XPS) was used to detect the amount of oxygen vacancies. The ferroelectric measurements showed that the ferroelectricity deteriorates with the increase in the number of oxygen vacancies. X-ray absorption spectroscopy (XAS) and XPS were used to study the electronic structure. The results indicated that the decreased ferroelectricity might be ascribed to the weakened hybridization between O 2p and Pb 6s and Ti 3d orbitals. The ferromagnetic behaviors were also observed in the thin films and saturated magnetization raised monotonously with the oxygen vacancy rising due to the enhanced F-center exchange interaction. Magnetoelectric coupling of the films weakened with oxygen vacancy increase.

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Publication details

The article was received on 24 Jan 2013, accepted on 08 May 2013 and first published on 10 May 2013

Article type: Paper

DOI: 10.1039/C3DT50257K

Citation: Dalton Trans., 2013,42, 10358-10364

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Effects of oxygen vacancy on the electronic structure and multiferroics in sol–gel derived Pb_0.8Co_0.2TiO₃ thin films

H. Zhao, J. Wang, L. Zhang, Y. Rong, J. Chen, K. Ibrahim and X. Xing, Dalton Trans., 2013, 42, 10358
DOI: 10.1039/C3DT50257K
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Dalton Transactions

Effects of oxygen vacancy on the electronic structure and multiferroics in sol–gel derived Pb_0.8Co_0.2TiO₃ thin films

Abstract

Supplementary files

Publication details

Effects of oxygen vacancy on the electronic structure and multiferroics in sol–gel derived Pb_0.8Co_0.2TiO₃ thin films

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