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. 2021 Nov 24;12:6814. doi: 10.1038/s41467-021-26739-1

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© The Author(s) 2021, corrected publication 2022

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Fig. 4 — a, b Fe K-edge X-ray absorption near-edge structure (XANES) spectra of Pr_0.5Ba_0.2Sr_0.3FeO_3−δ (A-PBSF30), (Pr_0.5Ba_0.2Sr_0.3)₂FeO_4+δ (R-PBSF30) with two references (Fe foil and Fe₂O₃). c Fourier-transformed Fe K-edge extended X-ray absorption fine structure (EXAFS) spectra of A-PBSF30 and R-PBSF30. X-ray photoelectron spectra (XPS) of Fe 2p_1/2 for d A-PBSF30 and e R-PBSF30.