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Phase Transformations and Properties of Thin Barium Neodymium Ferroniobate Films in the Temperature Range from –190 to 200°C

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Abstract—

Single-phase, impurity-free barium neodymium ferroniobate (Ba2NdFeNb4O15) films ~660 nm in thickness have been grown on a Pt(001)/MgO(001) substrate using rf cathode sputtering in an oxygen atmosphere. According to X-ray diffraction data, the films are c-axis-oriented. Two phase transformations have been identified in the Ba2NdFeNb4O15 films in the temperature range from –190 to 200°C: paraelectric → ferroelectric and ferroelectric → ferroelectric. The Ba2NdFeNb4O15 films have been shown to have high room-temperature energy efficiency. The mechanisms underlying the observed effects are discussed and potential applications of barium neodymium ferroniobate nanofilms are analyzed.

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Funding

This work was supported by the Russian Science Foundation, project no. 21-72-10180.

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Correspondence to A. V. Pavlenko.

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Translated by O. Tsarev

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Pavlenko, A.V., Stryukov, D.V., Zhidel’, K.M. et al. Phase Transformations and Properties of Thin Barium Neodymium Ferroniobate Films in the Temperature Range from –190 to 200°C. Inorg Mater 58, 1051–1057 (2022). https://doi.org/10.1134/S0020168522100107

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  • DOI: https://doi.org/10.1134/S0020168522100107

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