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Structural, Dielectric, and Ferroelectric Properties of a BiFeO3/Sr0.5Ba0.5Nb2O6/Pt(001)/MgO(001) Heterostructure

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Inorganic Materials Aims and scope

Abstract—

Using rf cathode sputtering in an oxygen atmosphere, we produced a heterostructure based on the bismuth ferrite (BFO) multiferroic and barium strontium niobate (SBN) ferroelectric: BiFeO3(1000 nm)/Sr0.5Ba0.5Nb2O6(1000 nm)/Pt(001)/MgO(001). It was free of impurity phases and had a root mean square surface roughness within 1% of its thickness. All of the layers in the heterostructure were grown epitaxially. The SBN-50 layer consisted of orientation domains tilted in the plane of the interface by ±18.4° with respect to the MgO substrate axes, and the crystallographic axes of the BFO and Pt layers were parallel to the substrate axes. The ferroelectric polarization of the material at U = 90 V was shown to be 59.3 μC/cm2. Our results demonstrate that, to describe the behavior of the relative dielectric permittivity (ε) of the heterostructure in the range 25–250°C, it is sufficient to take into account the ε(t) data for each layer. The mechanisms underlying the observed effects are discussed.

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Notes

  1. Joint Science and Technology Equipment Center, Southern Scientific Center, Russian Academy of Sciences (research, development, and testing) (no. 501994).

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Funding

This work was supported by the Russian Federation President’s Grants Council (grant no. MD-483.2022.1.2, research project G30110/22-01-EP) and by the Russian Federation Ministry of Science and Higher Education as part of the state research target for the Southern Scientific Center, Russian Academy of Sciences (project no. 122020100294-9).

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Authors and Affiliations

  1. Southern Scientific Center (Federal Research Center), Russian Academy of Sciences, 344006, Rostov-on-Don, Russia

    A. V. Pavlenko, Ya. Yu. Matyash & D. V. Stryukov

  2. Research Institute of Physics, Southern Federal University, 344090, Rostov-on-Don, Russia

    A. V. Pavlenko & N. V. Malomyzheva

Authors
  1. A. V. Pavlenko
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  2. Ya. Yu. Matyash
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  3. D. V. Stryukov
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  4. N. V. Malomyzheva
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Correspondence to A. V. Pavlenko.

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Translated by O. Tsarev

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Pavlenko, A.V., Matyash, Y.Y., Stryukov, D.V. et al. Structural, Dielectric, and Ferroelectric Properties of a BiFeO3/Sr0.5Ba0.5Nb2O6/Pt(001)/MgO(001) Heterostructure. Inorg Mater 59, 782–789 (2023). https://doi.org/10.1134/S0020168523070129

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