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Synthesis and Characterization of SrFexMn1-x(O,F)3-δ Oxide (δ = 0 and 0.5) and Oxyfluoride Perovskite Films.
Inorg Chem. 2020 Jul 20; 59(14):9990-9997.IC

Abstract

We report the synthesis and characterization of as-grown SrFexMn1-xO2.5 epitaxial films, which were also subjected to postgrowth oxidation and topotactic fluorination to obtain SrFexMn1-xO3 and SrFexMn1-xO2.5-δFγ films. We show how both the B-site cation and anion composition influence the structural, electronic, and optical properties of this family of perovskite materials. The Fe substitution of Mn in SrMnO2.5 gradually expands the c-axis parameter, as indicated by X-ray diffraction. With increasing x, the F content incorporated under identical fluorination conditions increases, reaching its maximum in SrFeO2.5-δFγ. In the compounds with mixed B-site occupation, the Fe 2p photoemission peaks are shifted upon fluorination, while the Mn 2p peaks are not, suggesting inductive effects lead to asymmetric responses in how F alters the Mn and Fe bonds. Electronic transport measurements reveal all compounds are insulators, with the exception of SrFeO3, and demonstrate that fluorination increases resistivity for all values of x. Optical absorption spectra in the SrFexMn1-xO2.5 and SrFexMn1-xO3 films evolve systematically as a function of x, consistent with a physical scenario in which optical changes with Fe substitution arise from a linear combination of Mn and Fe 3d bands within the electronic structure. In contrast, the F incorporation induces nonlinear changes to the optical response, suggesting a more complex impact on the electronic structure in materials with concurrent B-site and anion site substitution.

Authors+Show Affiliations

Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States.Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States.Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania 19104, United States.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

32628463

Citation

Wang, Jiayi, et al. "Synthesis and Characterization of SrFexMn1-x(O,F)3-δ Oxide (δ = 0 and 0.5) and Oxyfluoride Perovskite Films." Inorganic Chemistry, vol. 59, no. 14, 2020, pp. 9990-9997.
Wang J, Lefler BM, May SJ. Synthesis and Characterization of SrFexMn1-x(O,F)3-δ Oxide (δ = 0 and 0.5) and Oxyfluoride Perovskite Films. Inorg Chem. 2020;59(14):9990-9997.
Wang, J., Lefler, B. M., & May, S. J. (2020). Synthesis and Characterization of SrFexMn1-x(O,F)3-δ Oxide (δ = 0 and 0.5) and Oxyfluoride Perovskite Films. Inorganic Chemistry, 59(14), 9990-9997. https://doi.org/10.1021/acs.inorgchem.0c01148
Wang J, Lefler BM, May SJ. Synthesis and Characterization of SrFexMn1-x(O,F)3-δ Oxide (δ = 0 and 0.5) and Oxyfluoride Perovskite Films. Inorg Chem. 2020 Jul 20;59(14):9990-9997. PubMed PMID: 32628463.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Synthesis and Characterization of SrFexMn1-x(O,F)3-δ Oxide (δ = 0 and 0.5) and Oxyfluoride Perovskite Films. AU - Wang,Jiayi, AU - Lefler,Benjamin M, AU - May,Steven J, Y1 - 2020/07/06/ PY - 2020/7/7/pubmed PY - 2020/7/7/medline PY - 2020/7/7/entrez SP - 9990 EP - 9997 JF - Inorganic chemistry JO - Inorg Chem VL - 59 IS - 14 N2 - We report the synthesis and characterization of as-grown SrFexMn1-xO2.5 epitaxial films, which were also subjected to postgrowth oxidation and topotactic fluorination to obtain SrFexMn1-xO3 and SrFexMn1-xO2.5-δFγ films. We show how both the B-site cation and anion composition influence the structural, electronic, and optical properties of this family of perovskite materials. The Fe substitution of Mn in SrMnO2.5 gradually expands the c-axis parameter, as indicated by X-ray diffraction. With increasing x, the F content incorporated under identical fluorination conditions increases, reaching its maximum in SrFeO2.5-δFγ. In the compounds with mixed B-site occupation, the Fe 2p photoemission peaks are shifted upon fluorination, while the Mn 2p peaks are not, suggesting inductive effects lead to asymmetric responses in how F alters the Mn and Fe bonds. Electronic transport measurements reveal all compounds are insulators, with the exception of SrFeO3, and demonstrate that fluorination increases resistivity for all values of x. Optical absorption spectra in the SrFexMn1-xO2.5 and SrFexMn1-xO3 films evolve systematically as a function of x, consistent with a physical scenario in which optical changes with Fe substitution arise from a linear combination of Mn and Fe 3d bands within the electronic structure. In contrast, the F incorporation induces nonlinear changes to the optical response, suggesting a more complex impact on the electronic structure in materials with concurrent B-site and anion site substitution. SN - 1520-510X UR - https://www.unboundmedicine.com/medline/citation/32628463/Synthesis_and_Characterization_of_SrFe_x_Mn1-x(O,F)3-δ_Oxide_(δ_=_0_and_0.5)_and_Oxyfluoride_Perovskite_Films L2 - https://doi.org/10.1021/acs.inorgchem.0c01148 DB - PRIME DP - Unbound Medicine ER -
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