Ultrahigh-density ferroelectric data storage using scanning nonlinear dielectric microscopy

Yoshiomi Hiranaga, Yasuo Cho, Kenjiro Fujimoto, Yasuo Wagatsuma, Atsushi Onoe

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


Ferroelectrics have generated considerable interest as promising storage media. In this paper, an investigation of ultrahigh-density ferroelectric data storage based on scanning nonlinear dielectric microscopy (SNDM) was carried out. For the purpose of obtaining fundamental knowledge of high-density ferroelectric data storage, several experiments on nanodomain formation in lithium tantalate (LiTaO3) single crystal were conducted. As a result, a very small inverted domain with a radius of 6 nm was successfully formed in stoichiometric LiTaO3 (SLT), and in addition, a domain dot array with an areal density of 1.5 Tbit/inch2 was written on congruent LiTaO3 (CLT). Additionally, the first prototype high-density ferroelectric data storage system was developed. Using this system, reading and writing data transfer rates were evaluated.

Original languageEnglish
Pages (from-to)6050-6054
Number of pages5
JournalJapanese Journal of Applied Physics
Issue number9 B
Publication statusPublished - 2003 Sept


  • Data storage
  • Lithium tantalate
  • Nanodomain engineering
  • Scanning nonlinear dielectric microscopy


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