title: Regulation of the forming process and the set voltage distribution of unipolar resistance switching in spin-coated CoFe2O4 thin films.
abstract: We report the preparation of (111) preferentially oriented CoFe2O4 thin films on Pt(111)/TiO2/SiO2/Si substrates using a spin-coating process. The post-annealing conditions and film thickness were varied for cobalt ferrite (CFO) thin films, and Pt/CFO/Pt structures were prepared to investigate the resistance switching behaviors. Our results showed that resistance switching without a forming process is preferred to obtain less fluctuation in the set voltage, which can be regulated directly from the preparation conditions of the CFO thin films. Therefore, instead of thicker film, CFO thin films deposited by two times spin-coating with a thickness about 100 nm gave stable resistance switching with the most stable set voltage. Since the forming process and the large variation in set voltage have been considered as serious obstacles for the practical application of resistance switching for non-volatile memory devices, our results could provide meaningful insights in improving the performance of ferrite material-based resistance switching memory devices.
authors.affiliation: Department of Physics and Oxide Research Center, Hankuk University of Foreign Studies, YongIn, Gyeonggi 449-791 South Korea.
authors.forename: Millaty
authors.initials: M
authors.lastname: Mustaqima
authors.affiliation: Department of Physics and Oxide Research Center, Hankuk University of Foreign Studies, YongIn, Gyeonggi 449-791 South Korea.
authors.forename: Pilsun
authors.initials: P
authors.lastname: Yoo
authors.affiliation: Department of Physics, Semiconductor Photonics Research Center, Xiamen University, Xiamen, 361005 China.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.affiliation: Department of Physics and Oxide Research Center, Hankuk University of Foreign Studies, YongIn, Gyeonggi 449-791 South Korea.
authors.forename: Bo Wha
authors.initials: BW
authors.lastname: Lee
authors.affiliation: Department of Physics and Oxide Research Center, Hankuk University of Foreign Studies, YongIn, Gyeonggi 449-791 South Korea.
authors.forename: Chunli
authors.initials: C
authors.lastname: Liu
keywords: CoFe2O4; Forming process; Resistance switching; Set voltage