Resistance switching in epitaxial SrCoO{sub x} thin films
- Division of Quantum Phases and Devices, Department of Physics, Konkuk University, Seoul 143-791 (Korea, Republic of)
- Department of Physics and Division of Energy System Research, Ajou University, Suwon 443-749 (Korea, Republic of)
- Department of Physics and Astronomy and Center for Subwavelength Optics, Seoul National University, Seoul 151-747 (Korea, Republic of)
- Department of Physics, Sungkyunkwan University, Suwon 440-746 (Korea, Republic of)
- Department of Physics, Ewha Womans University, Seoul 120-750 (Korea, Republic of)
- Electronic Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791 (Korea, Republic of)
- Department of Material Science and Engineering, Seoul National University, Seoul 151-747 (Korea, Republic of)
We observed bipolar switching behavior from an epitaxial strontium cobaltite film grown on a SrTiO{sub 3} (001) substrate. The crystal structure of strontium cobaltite has been known to undergo topotactic phase transformation between two distinct phases: insulating brownmillerite (SrCoO{sub 2.5}) and conducting perovskite (SrCoO{sub 3−δ}) depending on the oxygen content. The current–voltage characteristics of the strontium cobaltite film showed that it could have a reversible insulator-to-metal transition triggered by electrical bias voltage. We propose that the resistance switching in the SrCoO{sub x} thin film could be related to the topotactic phase transformation and the peculiar structure of SrCoO{sub 2.5}.
- OSTI ID:
- 22318026
- Journal Information:
- Applied Physics Letters, Vol. 105, Issue 6; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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