title: ESR Study of (La,Ba)MnO3/ZnO Nanostructure for Resistive Switching Device.
abstract: Structure, electric, and resonance properties of (La,Ba)MnO3/ZnO nanostructure grown on SrTiO3(001) substrate have been investigated. It is found that at room temperature and relatively low voltages (|V |< 0.2 V), the structure shows good rectification behavior with rectification factor near 210. Resistive switching properties are detected after application of higher voltages. Temperature evolution of magnetic phase composition of the sample is analyzed in detail, based on results of electron spin resonance measurements. It is shown that magnetic state below 260 K is characterized by coexistence of ferromagnetic and paramagnetic phases, but no evidence of magnetic phase separation is revealed at higher temperatures. Different driving mechanisms for resistive switching, such as magnetic phase separation and/or electric field-induced migration of oxygen vacancies, are discussed in the context of obtained results.
authors.affiliation: Institute of Magnetism, 36b Vernadsky Boulevard, Kyiv, 03680, Ukraine. polek.taras@gmail.com.
authors.forename: Taras
authors.initials: T
authors.lastname: Polek
authors.affiliation: Department of Physics, Taras Shevchenko National University of Kyiv, Volodymyrska Street, 64/13, Kyiv, 01601, Ukraine.
authors.forename: Mykhaylo
authors.initials: M
authors.lastname: Semen'ko
authors.affiliation: Sagamihara Surface Lab, 1880-2 Kamimizo, Chuoku, Sagamihara, Kanagawa, 252-0243, Japan.
authors.forename: Tamio
authors.initials: T
authors.lastname: Endo
authors.affiliation: University of Tokyo, 7 Chome-3-1 Hongo, Bunkyo, Tokyo, Japan.
authors.forename: Yoshinobu
authors.initials: Y
authors.lastname: Nakamura
authors.affiliation: Department of Physics, Nano Research Lab, DAV University, Jalandhar, Punjab, 144012, India.
authors.forename: Gurmeet Singh
authors.initials: GS
authors.lastname: Lotey
authors.affiliation: Institute of Magnetism, 36b Vernadsky Boulevard, Kyiv, 03680, Ukraine.
authors.forename: Alexandr
authors.initials: A
authors.lastname: Tovstolytkin
keywords: Electron spin resonance; Magnetic phase separation; Oxide nanostructures; Rectification factor; Resistive switching; Substituted manganites; p–n heterojunctions