| Abstract Scope |
We previously proposed ferroelectric data storage that uses scanning nonlinear dielectric microscopy (SNDM), called SNDM probe memory, as a next-generation ultrahigh-density information recording method. We confirmed an extremely high recording density and high-speed writing using LiTaO3 crystal media. However, since reading is based on the detection of very small nonlinear dielectric constants of ferroelectric materials using SNDM technique, slow playback speed hinders the practical use of SNDM probe memory. To solve this problem, we propose a heat-assisted ferroelectric reading (HAFeR) method that increases the reading speed (Gbps order) while maintaining the polarization retention characteristics. This is achieved by locally heating the medium for a very short time at the data reading position using laser pulse irradiation. The proposed method overcomes the fundamental problems of next-generation ultrahigh-density ferroelectric data storage. |