Resistance switching in epitaxial SrCoO{sub x} thin films

Journal Article · Mon Aug 11 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4893323· OSTI ID:22318026

Tambunan, Octolia T.; Parwanta, Kadek J.; Acharya, Susant K.; Lee, Bo Wha; Kim, Yeon Soo; Park, Bae Ho ^[1]; Jeong, Huiseong; Park, Ji-Yong ^[2]; Cho, Myung Rae; Park, Yun Daniel ^[3]; Choi, Woo Seok ^[4]; Kim, Dong-Wook ^[5]; Jin, Hyunwoo; Lee, Suyoun ^[6]; Song, Seul Ji; Kang, Sung-Jin; Kim, Miyoung; Hwang, Cheol Seong ^[7]

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1. Division of Quantum Phases and Devices, Department of Physics, Konkuk University, Seoul 143-791 (Korea, Republic of)
2. Department of Physics and Division of Energy System Research, Ajou University, Suwon 443-749 (Korea, Republic of)
3. Department of Physics and Astronomy and Center for Subwavelength Optics, Seoul National University, Seoul 151-747 (Korea, Republic of)
4. Department of Physics, Sungkyunkwan University, Suwon 440-746 (Korea, Republic of)
5. Department of Physics, Ewha Womans University, Seoul 120-750 (Korea, Republic of)
6. Electronic Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791 (Korea, Republic of)
7. 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

Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CRYSTAL STRUCTURE
EPITAXY
OXYGEN
PEROVSKITE
PHASE TRANSFORMATIONS
STRONTIUM
STRONTIUM CARBONATES
STRONTIUM TITANATES
THIN FILMS