Epitaxial growth of high quality SrFeO3 films on (001) oriented (LaAlO3)0.3(Sr2TaAlO6)0.7
Abstract
Growth of strontium ferrite SrFeO3 films with stoichiometry of (1:1:3) is challenging as the unstable Fe4+ oxidation state favors the formation of O vacancies. Here, we report layer by layer growth of SrFeO3 on (001) oriented (LaAlO3)0.3(Sr2TaAlO6)0.7 using ozone assisted molecular beam epitaxy. Upon cooling from room temperature, the film’s resistivity decreased from 750 μΩ cm to 150 μΩ cm, as low as the best single crystals, with two identifiable transition points near 110 K and 60 K in resistivity measurements, being hysteretic between cooling and warming through the 60 K transition. During various annealing steps, the low temperature resistivity changes by orders of magnitude, accompanied by an increase in the c-axis lattice parameter. The hysteresis near 60 K persists for a wide range of annealing conditions. We have identified conditions under which changes due to annealing can be reversed. Here, we attribute changes in resistivity and out of plane lattice parameter to the reversible movement of oxygen ions in the lattice. SrFeO3 may be a promising material for resistive memory applications based upon the control of oxygen vacancies.
- Authors:
-
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE
- OSTI Identifier:
- 1415602
- Alternate Identifier(s):
- OSTI ID: 1411987
- Grant/Contract Number:
- AC02-06CH11357; DEAC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 111; Journal Issue: 23; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Hong, Deshun, Liu, Changjiang, Pearson, John, and Bhattacharya, Anand. Epitaxial growth of high quality SrFeO3 films on (001) oriented (LaAlO3)0.3(Sr2TaAlO6)0.7. United States: N. p., 2017.
Web. doi:10.1063/1.5002672.
Hong, Deshun, Liu, Changjiang, Pearson, John, & Bhattacharya, Anand. Epitaxial growth of high quality SrFeO3 films on (001) oriented (LaAlO3)0.3(Sr2TaAlO6)0.7. United States. https://doi.org/10.1063/1.5002672
Hong, Deshun, Liu, Changjiang, Pearson, John, and Bhattacharya, Anand. Mon .
"Epitaxial growth of high quality SrFeO3 films on (001) oriented (LaAlO3)0.3(Sr2TaAlO6)0.7". United States. https://doi.org/10.1063/1.5002672. https://www.osti.gov/servlets/purl/1415602.
@article{osti_1415602,
title = {Epitaxial growth of high quality SrFeO3 films on (001) oriented (LaAlO3)0.3(Sr2TaAlO6)0.7},
author = {Hong, Deshun and Liu, Changjiang and Pearson, John and Bhattacharya, Anand},
abstractNote = {Growth of strontium ferrite SrFeO3 films with stoichiometry of (1:1:3) is challenging as the unstable Fe4+ oxidation state favors the formation of O vacancies. Here, we report layer by layer growth of SrFeO3 on (001) oriented (LaAlO3)0.3(Sr2TaAlO6)0.7 using ozone assisted molecular beam epitaxy. Upon cooling from room temperature, the film’s resistivity decreased from 750 μΩ cm to 150 μΩ cm, as low as the best single crystals, with two identifiable transition points near 110 K and 60 K in resistivity measurements, being hysteretic between cooling and warming through the 60 K transition. During various annealing steps, the low temperature resistivity changes by orders of magnitude, accompanied by an increase in the c-axis lattice parameter. The hysteresis near 60 K persists for a wide range of annealing conditions. We have identified conditions under which changes due to annealing can be reversed. Here, we attribute changes in resistivity and out of plane lattice parameter to the reversible movement of oxygen ions in the lattice. SrFeO3 may be a promising material for resistive memory applications based upon the control of oxygen vacancies.},
doi = {10.1063/1.5002672},
journal = {Applied Physics Letters},
number = 23,
volume = 111,
place = {United States},
year = {Mon Dec 04 00:00:00 EST 2017},
month = {Mon Dec 04 00:00:00 EST 2017}
}
Web of Science
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Works referencing / citing this record:
Spin Seebeck effect in insulating SrFeO 3−δ films
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