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Title: Oxygen Vacancy-Tuned Physical Properties in Perovskite Thin Films with Multiple B-site Valance States

Journal Article · · Scientific Reports
DOI:https://doi.org/10.1038/srep46184· OSTI ID:1360705
 [1];  [1];  [2];  [1];  [1];  [1];  [1];  [2];  [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Texas, San Antonio, TX (United States). Dept. of Physics and Astronomy
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); The State Univ. of New York, Buffalo, NY (United States). Dept. of Materials Design and Innovation

Controlling oxygen content in perovskite oxides with ABO3 structure is one of most critical steps for tuning their functionality. Notably, there have been tremendous efforts to understand the effect of changes in oxygen content on the properties of perovskite thin films that are not composed of cations with multiple valance states. Here, we study the effect of oxygen vacancies on structural and electrical properties in epitaxial thin films of SrFeO3-δ (SFO), where SFO is a compound with multiple valance states at the B site. Various annealing treatments are used to produce different oxygen contents in the films, which has resulted in significant structural changes in the fully strained SFO films. The out-of-plane lattice parameter and tetragonality increase with decreasing oxygen concentration, indicating the crystal structure is closely related to the oxygen content. Importantly, variation of the oxygen content in the films significantly affects the dielectric properties, leakage conduction mechanisms, and the resistive hysteresis of the materials. These results establish the relationship between oxygen content and structural and functional properties for a range of multivalent transition metal oxides.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC)
Contributing Organization:
Univ. of Texas, San Antonio, TX (United States); The State Univ. of New York, Buffalo, NY (United States)
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1360705
Report Number(s):
LA-UR-16-26175
Journal Information:
Scientific Reports, Vol. 7; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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Recent Progress in Photocatalytic CO 2 Reduction Over Perovskite Oxides journal September 2017
The effects of the oxygen content on the photoelectrochemical properties of LaFeO3 perovskite thin films obtained by pulsed laser deposition journal November 2019
Bi 2 Fe 4 O 9 thin films as novel visible-light-active photoanodes for solar water splitting journal January 2019
XMCD study of magnetism and valence state in iron-substituted strontium titanate journal May 2019
Reconfigurable lateral anionic heterostructures in oxide thin films via lithographically defined topochemistry journal July 2019