Enhanced single-phased multiferroic properties of Ca-doped filled tetragonal tungsten bronze Ba4Sm2Fe2Nb8O30 ceramics

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Abstract

Effects of Ca-doped on single-phased multiferroic properties of polycrystalline Ba4 − 2xCa2xSm2Fe2Nb8O30 (x = 0, 0.2, 0.4, 0.6) ceramics were fabricated via a conventional solid-state reaction method. All of the Ba4 − 2xCa2xSm2Fe2Nb8O30 (BCSFN) ceramics were filled tetragonal tungsten bronze crystal structures which produced dense microstructures. Comparing with Ba4Sm2Fe2Nb8O30 (x = 0), the dielectric constant of BCSFN ceramics was increased remarkably especially in the sample of x = 0.4 that the dielectric constant was above 103 above 100 °C. Meanwhile, due to grain boundary barriers were reduced and leakage current increased in the BCSFN ceramic, dielectric loss increased with increasing of Ca2+ content. For ferroelectric property, the maximum remanent polarization (Pr) of 6.67 µC/cm2 was observed for the x = 0.4. Moreover, in polarization–electric field (P–E) loops, the maximum average breakdown strength (Eb) was 199.60 kV/cm. Meanwhile, for magnetic property, the remnant polarization and maximum moments were 0.85 emu/g and 1.78 emu/g for x = 0.4. Therefore, Ca2+ modification could impact both ferroelectric and magnetic properties in the BSFN ceramics.

Notes

Acknowledgements

The present work was supported by National Natural Science Foundation of China (51572160), the Natural Science Foundation of Shaanxi Province (2016JQ5083) and Graduate Innovation Fund of Shaanxi University of Science and Technology (2016T90881).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Zhuo Wang
    • 1
  • Yu Jia Xiao
    • 1
  • Tian Wang
    • 1
  • Qiao Li Wu
    • 2
  1. 1.School of Materials Science and EngineeringShaanxi University of Science and TechnologyXi’anChina
  2. 2.Xi’an Chuang Lian Electronic Component (Group) Co. Ltd.Xi’anChina

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