Nano-sized inverted domain dots in ferroelectric materials is a technology with potential applications in ultrahigh-density rewritable data storage systems. Up to now, we have studied domain inversion characteristics of stoichiometric and congruent LiTaO 3 single crystals in nanoscopic area using scanning nonlinear dielectric microscopy (SNDM), which is the technique for observing ferroelectric polarization distribution with sub-nanometer resolution. In this study, we have revealed nano-sized inverted domain remained stably for a long time, and successfully formed inverted domain dots at a data density of 1.50 Tbit/inch 2 , representing the highest memory density for rewritable electric data storage reported to date.
- Ferroelectric data storage
- Lithium tantalate single crystal
- Scanning nonlinear dielectric microscopy
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics