Abstract
A double perovskite (AʹAʺB2O6) is a phase where site A (Aʹ and Aʺ) elements are ordered to form alternating AʹO and AʺO layers. The energetically stable structures of double and complex perovskite phases were investigated using a genetic algorithm and the density functional theory for Pr[Ba1 − xSrx][Co1 − yFey]2O5.5, where x and y = 0, 0.25, 0.5, 0.75, 1. The energy difference between the most energetically stable double and complex perovskites decreased with x because the difference between the ion radii at sites Aʹ and Aʺ decreased. The double perovskites were preferred when x and y are approximately 0 and 0.5, respectively, which is in good agreement with literature. The energy difference is a feasible descriptor for evaluating the phase stability between double and complex perovskites.
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Due to confidentiality agreements, supporting data can only be made available to bona fide researchers subject to a non-disclosure agreement. Details of the data and how to request access are available from yckim@koreatech.ac.kr at Korea University of Technology and Education.
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Acknowledgements
This research was supported by the Institutional Research Program (2E31852) of the Korea Institute of Science and Technology (KIST), by "Regional Innovation Strategy (RIS)" through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (MOE) (2021RIS-004), and by the Education and Research Promotion Program of KOREATECH in 2021.
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Jo, JY., Kim, HK., Kim, J. et al. Phase stability of double perovskite in Pr[Ba1 − xSrx][Co1 − yFey]2O5.5 using genetic algorithm and density functional theory. J. Korean Ceram. Soc. 60, 434–439 (2023). https://doi.org/10.1007/s43207-022-00278-x
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DOI: https://doi.org/10.1007/s43207-022-00278-x