title: Direct Observation of Domain Motion Synchronized with Resistive Switching in Multiferroic Thin Films.
abstract: The room-temperature resistive switching characteristics of ferroelectric, ferroelastic, and multiferroic materials are promising for application in nonvolatile memory devices. These resistive switching characteristics can be accompanied by a change in the ferroic order parameters via applied external electric and magnetic excitations. However, the dynamic evolution of the order parameters between two electrodes, which is synchronized with resistive switching, has rarely been investigated. In this study, for the first time, we directly monitor the ferroelectric/ferroelastic domain switching dynamics between two electrodes in multiferroic BiFeO3(BFO) planar devices, which cause resistive switching, using piezoresponse force microscopy. It is demonstrated that the geometrical relationship between the ferroelectric domain and electrode in BFO planar capacitors with only 71° domain walls significantly affects both the ferroelectric domain dynamics and the resistive switching. The direct observation of domain dynamics relevant to resistive switching in planar devices may pave the way to a controllable combination of ferroelectric characteristics and resistive switching in multiferroic materials.
authors.affiliation: Division of Quantum Phase and Devices, Department of Physics, Konkuk University , Seoul 143-701, Korea.
authors.forename: Ji Hye
authors.initials: JH
authors.lastname: Lee
authors.affiliation: Division of Quantum Phase and Devices, Department of Physics, Konkuk University , Seoul 143-701, Korea.
authors.forename: Chansoo
authors.initials: C
authors.lastname: Yoon
authors.affiliation: Division of Quantum Phase and Devices, Department of Physics, Konkuk University , Seoul 143-701, Korea.
authors.forename: Sangik
authors.initials: S
authors.lastname: Lee
authors.affiliation: Korea Research Institute of Standards and Science , Daejeon 305-304, Korea.
authors.forename: Young Heon
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Division of Quantum Phase and Devices, Department of Physics, Konkuk University , Seoul 143-701, Korea.
authors.forename: Bae Ho
authors.identifier: http://orcid.org/0000-0003-0928-329X
authors.initials: BH
authors.lastname: Park
keywords: BiFeO3; conduction mechanism; domain dynamics; multiferroic; piezoresponse force microscopy; resistive switching