Files and links (1)
Accepted (AM)Open Access (License Unspecified), Open
Journal article
Physical properties of epitaxial SrMnO2.5−δFγ oxyfluoride films
Journal of physics. Condensed matter, v 31(36), pp 365602-365602
19 Jun 2019
PMID: 31121575
Abstract
Recently, topotactic fluorination has become an alternative way of doping epitaxial perovskite oxides through anion substitution to engineer their electronic properties instead of the more commonly used cation substitution. In this work, epitaxial oxyfluoride SrMnO2.5−δFγ films were synthesized via topotactic fluorination of SrMnO2.5 films using polytetrafluoroethylene as the fluorine source. Oxidized SrMnO3 films were also prepared for comparison with the fluorinated samples. The F content, probed by x-ray photoemission spectroscopy, was systematically controlled by adjusting fluorination conditions. Electronic transport measurements reveal that increased F content (up to γ = 0.14) systematically increases the electrical resistivity, despite the nominal electron-doping induced by F substitution for O in these films. In contrast, oxidized SrMnO3 exhibits a decreased resistivity and conduction activation energy. A blue-shift of optical absorption features occurs with increasing F content. Density functional theory calculations indicate that F acts as a scattering center for electronic transport, controls the observed weak ferromagnetic behavior of the films, and reduces the inter-band optical transitions in the manganite films. These results stand in contrast to bulk electron-doped La1−xCexMnO3, illustrating how aliovalent anionic substitutions can yield physical behavior distinct from A-site substituted perovskites with the same nominal B-site oxidation states.
Metrics
Details
- Title
- Physical properties of epitaxial SrMnO2.5−δFγ oxyfluoride films
- Creators
- Jiayi Wang - Drexel UniversityYongjin Shin - Northwestern UniversityNicolas Gauquelin - University of AntwerpYizhou Yang - Drexel UniversityChristopher Lee - Drexel UniversityDaen Jannis - University of AntwerpJohan Verbeeck - EMAT , University of Antwerp-Groenenborgerlaan 171, 2020 Antwerp, BelgiumJames M Rondinelli - Northwestern UniversitySteven J May - Drexel University
- Publication Details
- Journal of physics. Condensed matter, v 31(36), pp 365602-365602
- Publisher
- IOP Publishing
- Number of pages
- 10
- Grant note
- DE-AC02-06CH11357 / Argonne National Laboratory (https://doi.org/10.13039/100006224) W911NF-14-1-0493 / Army Research Office (https://doi.org/10.13039/100000183) CMMI-1562223 / Division of Civil, Mechanical and Manufacturing Innovation (https://doi.org/10.13039/100000147) ACI-1053575 / Division of Advanced Cyberinfrastructure (https://doi.org/10.13039/100007523) GOA project "Solarpaint" / Universiteit Antwerpen (https://doi.org/10.13039/501100007660) G093417N / Fonds Wetenschappelijk Onderzoek (https://doi.org/10.13039/501100003130) DMR-1454688 / Division of Materials Research (https://doi.org/10.13039/100000078)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000472232000002
- Scopus ID
- 2-s2.0-85069889907
- Other Identifier
- 991019167598604721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Physics, Condensed Matter