Journal article
Raman scattering in La1−xSrxFeO3−δ thin films: annealing-induced reduction and phase transformation
Journal of physics. Condensed matter, v 27(15), pp 155401-155401
27 Mar 2015
PMID: 25812551
Abstract
Raman scattering in thin film La0.2Sr0.8FeO3−δ on MgO(0 0 1) collected at 300 K after different stages of annealing at selected temperatures T (300 K < T < 543 K, to 10 h) and analysis reveal changes in spectral characteristics due to a loss of oxygen, onset of oxygen vacancy-induced disorder, and activation of Raman-inactive modes that are attributed to symmetry lowering. The interpretation is further supported by carrier transport measurements under identical conditions showing orders of magnitude increase in the resistivity induced by oxygen loss. After prolonged annealing in air, evolution of the spectrum signals the appearance of a possible topotactic transformation of the crystal structure from that of the rhombohedral ABO3 perovskites to that of Brownmillerite-like structure consisting of octahedrally and tetrahedrally coordinated Fe atoms.
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Details
- Title
- Raman scattering in La1−xSrxFeO3−δ thin films: annealing-induced reduction and phase transformation
- Creators
- Mohammad A Islam - Drexel UniversityYujun Xie - Drexel University Department of Materials Science and Engineering, and the A J Drexel Institute for Energy and the Environment, Philadelphia, PA 19104, USAMark D Scafetta - Drexel University Department of Materials Science and Engineering, and the A J Drexel Institute for Energy and the Environment, Philadelphia, PA 19104, USASteven J May - Drexel UniversityJonathan E Spanier - Drexel University
- Publication Details
- Journal of physics. Condensed matter, v 27(15), pp 155401-155401
- Publisher
- IOP Publishing
- Number of pages
- 7
- Grant note
- N00014-11-1-0664 / Office of Naval Research (http://dx.doi.org/10.13039/100000006) P200A100117 / US Department of Education
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; Mechanical Engineering and Mechanics
- Web of Science ID
- WOS:000351739000012
- Scopus ID
- 2-s2.0-84925742884
- Other Identifier
- 991019167539904721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Physics, Condensed Matter