Nanoscale ferroelectric information storage based on scanning nonlinear dielectric microscopy

Yasuo Cho

研究成果: Review article査読

9 被引用数 (Scopus)

抄録

An investigation of ultrahigh-density ferroelectric data storage based on scanning nonlinear dielectric microscopy (SNDM) is described. For the purpose of obtaining fundamental knowledge on high-density ferroelectric data storage, several experiments on nanodomain formation in a lithium tantalate (LiTaO 3) single crystal were conducted. Through domain engineering, a domain dot array with an areal density of 1.5 Tbit/inch 2 was formed on congruent LiTaO 3 (CLT). Sub-nanosecond (500 psec) domain switching speed also has been achieved. Next, actual information storage is demonstrated at a density of 1 Tbit/inch 2. Finally, it is described that application of a very small dc offset voltage is very effective in accelerating the domain switching speed and in stabilizing the reversed nano-domain dots. Applying this offset application technique, we formed a smallest artificial nano-domain single dot of 5.1 nm in diameter and artificial nano-domain dot-array with a memory density of 10.1 Tbit/inch 2 and a bit spacing of 8.0 nm, representing the highest memory density for rewritable data storage reported to date.

本文言語English
ページ(範囲)105-116
ページ数12
ジャーナルJournal of Nanoscience and Nanotechnology
7
1
出版ステータスPublished - 2007 1月 1

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 材料科学(その他)
  • 工学(その他)

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