| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Mesoscale Phenomena in Functional Polycrystals and Their Nanostructures
|
| Presentation Title |
Bidirectional Dynamic Mechanical Writing of Polar Bubbles |
| Author(s) |
Jaegyu Kim, Yeongki Yeo, Yong-Jun Kwon, Jeongdae Seo, Chan-Ho Yang |
| On-Site Speaker (Planned) |
Jaegyu Kim |
| Abstract Scope |
Topological structures of ferroelectric polarization have been increasingly explored because of their novel functionalities for next-generation electronic applications. They have primarily been discovered in specific systems, such as superlattices caused by boundary conditions. However, precise control of the topological polar state remains still challenging. Here, we demonstrate the observation of skyrmion-like centre-type polar bubble domains in compressively strained BiFeO3 thin films with a morphotropic phase boundary. These domains are mechanically generated by dynamic force of vibrational tapping using scanning probe microscope tips. Vibrational tapping can bidirectionally switch out-of-plane polarization in the BiFeO3 film. The creation of bubble domains is accompanied by structural phase transitions between two monoclinic phases, tetragonal-like BiFeO3 and rhombohedral-like BiFeO3. The bubble domains can be accurately written, mechanically or electrically erased, and remain stable for longer than ~500 days. Our study provides novel approaches for bidirectional mechanical switching of ferroelectric polarization for non-volatile magnetoelectric applications. |