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Preparation and characterization of multiferroic CoFe2O4/Bi0.97Ce0.03FeO3 coaxial nanotubes

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Abstract

Multiferroic CoFe2O4 (CFO)/Bi0.97Ce0.03FeO3 (BCFO) coaxial nanotubes were prepared by a sol-gel template method. Transmission electron microscopy revealed that the coaxial nanotubes featured with inner CFO and outer BCFO nanotubes. Selected area electron diffraction confirmed the coexistence of spinel CFO and perovskite BCFO phases in the coaxial nanotubes. Vibrating sample magnetometer measurements showed that the saturated magnetization of the coaxial nanotubes was 3.3 emu/g, smaller than that of CFO nanotubes. The P–E hysteresis loop of the coaxial nanotubes was of poor shape due to possible high conductivity in the inner CFO nanotubes. Dielectric measurements exhibited that the dielectric constant of the coaxial nanotubes decreased while the dielectric loss increased due probably to the small dielectric constant and high conductivity in the inner CFO nanotube. Ferroelectric and magnetic properties were simultaneously demonstrated in the CFO/BCFO coaxial nanotubes.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 50872097 and 11074193) and the National Basic Research Program of China (973 Program) (Granted No. 2011CB933304) as well as the Fundamental Research Funds for the Central Universities (Grant No. 20102020101000018).

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Authors and Affiliations

  1. School of Physics and Technology, Wuhan University, Wuhan, 430072, P.R. China

    X. L. Liu, M. Y. Li, J. Wang, Z. Q. Hu, Y. D. Zhu & X. Z. Zhao

  2. Key Laboratory of Artificial Micro and Nanostructural Materials and Devices of the Ministry of Education, Wuhan University, Wuhan, 430072, P.R. China

    X. L. Liu, M. Y. Li, J. Wang, Z. Q. Hu, Y. D. Zhu & X. Z. Zhao

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  1. X. L. Liu
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  2. M. Y. Li
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Correspondence to M. Y. Li.

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Liu, X.L., Li, M.Y., Wang, J. et al. Preparation and characterization of multiferroic CoFe2O4/Bi0.97Ce0.03FeO3 coaxial nanotubes. Appl. Phys. A 108, 829–834 (2012). https://doi.org/10.1007/s00339-012-6976-5

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