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Influence of cycling electric polarization on multiferroic behaviors in heterostructural films composed of ferroelectric and ferromagnetic oxides

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Abstract

The CoFe2O4/Pb(Zr0.52Ti0.48)O3 bilayer films were prepared by a sol–gel process, and the influence of cycling electric polarization on the multiferroic behaviors of the bilayer films was studied. The ferroelectric polarization hysteresis loops under various choices of magnetic bias were measured by an integrating current method. The results showed that after undergoing cycling electric polarization the ferroelectric polarization of the bilayer films enhanced and the suppression of ferroelectric polarization by external magnetic bias remarkably weakened. Based on the measurements of activation energy and leakage current, we confirmed that the oxygen vacancy migration in the bilayer films occurred during cycling electric polarization. Furthermore, we analyzed the mechanism of the influence of cycling electric polarization on the multiferroic behaviors of the bilayer films and attributed it to the oxygen vacancy migration, which could cause a part of ferroelectric domains to be unpinned from the oxygen vacancies and become more active under electric field and magnetic bias.

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Acknowledgements

This work was supported by the National Key Projects for Basic Research of China (Grant Nos. 2010CB923401, 2009CB623303), the National Natural Science Foundation of China (Grant Nos. 50972055, 11134005), and PAPD project.

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Authors and Affiliations

  1. National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, P.R. China

    Zi-Wei Li, Ming-Xiu Zhou, Bo Chen, Jian-Guo Wan, Jun-Ming Liu & Guang-Hou Wang

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  1. Zi-Wei Li
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  2. Ming-Xiu Zhou
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  3. Bo Chen
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  4. Jian-Guo Wan
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  5. Jun-Ming Liu
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Correspondence to Jian-Guo Wan.

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Li, ZW., Zhou, MX., Chen, B. et al. Influence of cycling electric polarization on multiferroic behaviors in heterostructural films composed of ferroelectric and ferromagnetic oxides. Appl. Phys. A 113, 477–482 (2013). https://doi.org/10.1007/s00339-013-7549-y

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  • DOI: https://doi.org/10.1007/s00339-013-7549-y

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