Scanning nonlinear dielectric microscopy and its use in next-generation ultrahigh-density ferroelectric data storage

Yasuo Cho, Hiroyuki Odagawa, Koya Ohara, Yoshiomi Hiranaga

研究成果: Article査読

1 被引用数 (Scopus)

抄録

We have developed a high-resolution scanning nonlinear dielectric microscope that can provide imaging with subnanometer resolution of domain structure in the polarization of ferroelectrics. Using this microscope, we were able to image several types of domain structures in ferroelectric materials. Moreover, because nonlinear dielectric responses of any order can be used for imaging, and because it is simple to vary the order used, our nonlinear dielectric constant microscope has higher-order modes of operation, whose use improves the resolution of the microscope. In addition, the configuration of our microscope allows us to image the polarization in the direction parallel to the sample surface by suitably rotating the direction of the applied electric fields. This imaging is possible because the microscope yields information about the full third-order nonlinear dielectric constant tensor. In the course of exploring ways to apply this microscope technology to next-generation ultrahigh-density ferroelectric data storage, we have recently shown data storage. at densities of 1.5 Tbit/in2, which is the world's highest storage density in a rewriteable storage medium.

本文言語English
ページ(範囲)19-31
ページ数13
ジャーナルElectronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
89
1
DOI
出版ステータスPublished - 2006 1 1

ASJC Scopus subject areas

  • 物理学および天文学(全般)
  • コンピュータ ネットワークおよび通信
  • 電子工学および電気工学

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