Multiferroic Properties of Rare-Earth Eu and Nd Doped BiFeO₃ Thin Films

Meiya Li Department of Electronic Science and Technology, School of Physical Science and Technology, Wuhan University, Wuhan, 430072, P. R. China; Key Laboratory of Acoustic and Photonic Material and Device of the Ministry of Education, Wuhan University, Wuhan, 430072, P. R. China

Zhongqiang Hu Department of Electronic Science and Technology, School of Physical Science and Technology, Wuhan University, Wuhan, 430072, P. R. China; Key Laboratory of Acoustic and Photonic Material and Device of the Ministry of Education, Wuhan University, Wuhan, 430072, P. R. China

Ling Pei Department of Electronic Science and Technology, School of Physical Science and Technology, Wuhan University, Wuhan, 430072, P. R. China; Key Laboratory of Acoustic and Photonic Material and Device of the Ministry of Education, Wuhan University, Wuhan, 430072, P. R. China

Jun Liu Department of Electronic Science and Technology, School of Physical Science and Technology, Wuhan University, Wuhan, 430072, P. R. China; Key Laboratory of Acoustic and Photonic Material and Device of the Ministry of Education, Wuhan University, Wuhan, 430072, P. R. China

Jing Wang Department of Electronic Science and Technology, School of Physical Science and Technology, Wuhan University, Wuhan, 430072, P. R. China; Key Laboratory of Acoustic and Photonic Material and Device of the Ministry of Education, Wuhan University, Wuhan, 430072, P. R. China

Benfang Yu Department of Electronic Science and Technology, School of Physical Science and Technology, Wuhan University, Wuhan, 430072, P. R. China; Key Laboratory of Acoustic and Photonic Material and Device of the Ministry of Education, Wuhan University, Wuhan, 430072, P. R. China

Xingzhong Zhao Department of Electronic Science and Technology, School of Physical Science and Technology, Wuhan University, Wuhan, 430072, P. R. China; Key Laboratory of Acoustic and Photonic Material and Device of the Ministry of Education, Wuhan University, Wuhan, 430072, P. R. China

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Abstract

Pure BiFeO₃ (BFO), Eu doped BFO (BEF), and Nd doped BFO (BNF) multiferroic films were prepared by pulsed laser deposition on Pt/Ti/SiO₂/Si substrates. XRD analysis revealed that the films had the rhombohedral structure with doping-induced lattice distortion. The Eu and Nd doping significantly improved the dielectric, ferroelectric, and ferromagnetic properties of the BFO films. Saturated hysteresis loops were observed in BEF and BNF films with remnant polarization of 37 μC/cm² and 60 μC/cm², respectively. The magnetization was demonstrated with remnant magnetization of 0.10 emu/cm³ and 0.60 emu/cm³ for the BEF and BNF films, respectively. The improvements and mechanism of different element doping on the properties of the BFO films were discussed.

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Acknowledgments

This work was supported by the National Key Basic Research and Development Program of China (Granted No 2006CB932305) and the National Natural Science Foundation of China (Granted No. 50872097)

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Multiferroic Properties of Rare-Earth Eu and Nd Doped BiFeO₃ Thin Films

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Multiferroic Properties of Rare-Earth Eu and Nd Doped BiFeO₃ Thin Films