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Enhanced Ferroelectric Polarization in Laser-ablated Bi4Ti3O12 Thin Films by Controlling Preferred Orientation

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Abstract

Polycrystalline Bi4Ti3O12 thin films with various fractions of a-axis, c-axis and random orientations have been grown on Pt(111)/Ti/SiO2/Si substrates by laser-ablation under different kinetic growth conditions. The relationship between the structure and ferroelectric property of the films was investigated, so as to explore the possibility of enhancing ferroelectric polarization by controlling the preferred orientation. The structural characterization indicated that the large growth rate and high oxygen background pressure were both favorable for the growth of non-c-axis oriented grains in the Bi4Ti3O12 thin films. The films with high fractions of a-axis and random orientations, i e, f (a-sxis) = 28.3% and f (random) = 69.6%, could be obtained at the deposition temperature of 973 K, oxygen partial pressure of 15 Pa and laser fluence of 4.6 J/cm2, respectively. It was also noted that the variation of ferroelectric polarization was in accordance with the evolution non-c-axis orientation. A large value of remanent polarization (2Pr = 35.5 μC/cm2) was obtained for the Bi4Ti3O12 thin films with significant non-c-axis orientation, even higher than that of rare-earth-doped Bi4Ti3O12 films.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China

    Chuanbin Wang  (王传彬), Sijun Luo, Qiang Shen & Lianmeng Zhang

  2. Department of Physics and Electronics, Liupanshui Normal University, Liupanshui, 553004, China

    Mingzhe Hu

Authors
  1. Chuanbin Wang  (王传彬)
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  2. Sijun Luo
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  3. Qiang Shen
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  4. Mingzhe Hu
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  5. Lianmeng Zhang
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Correspondence to Chuanbin Wang  (王传彬).

Additional information

Funded by the International Science and Technology Cooperation Project of Hubei Province (2016AHB008), the Natural Science Foundation of Hubei Province (2015CFB724, 2016CFA006), the National Natural Science Foundation of China (51272195, 51521001) and the National Key Research and Development Program of China (2017YFB0310400)

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Wang, C., Luo, S., Shen, Q. et al. Enhanced Ferroelectric Polarization in Laser-ablated Bi4Ti3O12 Thin Films by Controlling Preferred Orientation. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 33, 268–272 (2018). https://doi.org/10.1007/s11595-018-1816-9

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  • DOI: https://doi.org/10.1007/s11595-018-1816-9

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