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2001 Fiscal Year Final Research Report Summary

Electric dipole moment visualization using scanning nonlinear dielectric microscopy

Research Project

Project/Area Number 12450036
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied physics, general
Research InstitutionTohoku University

Principal Investigator

CHO Yasuo  Tohoku University, Research Institute of Electrical Communication, Professor, 電気通信研究所, 教授 (40179966)

Co-Investigator(Kenkyū-buntansha) ODAGAWA Hiroyuki  Tohoku University, Research Institute of Electrical Communication, Research Associate, 電気通信研究所, 助手 (00250845)
Project Period (FY) 2000 – 2001
KeywordsScanning Nonlinear Dielectric microscopy / Atomic scale resolution / Higher order nonlinear dielectric microscopy / Ultra-high density ferroelectric data storage
Research Abstract

We performed following three investigation and obtained unexpectedly good results
1. Development of scanning nonlinear dielectric microscope with sub-nanometer resolution.
We succeeded to develop a scanning nonlinear dielectric microscopy with sub-nanometer resolution and using this new microscope, we successfully performed direct measurement of domain wall thickness. We think that this is the first direct observation of ferroelectric domain wall. Next, we also newly invented higher-order nonlinear dielectric microscopy technique which can detect the ferroelectric surface layer with the thickness under one-unite cell.
2. Atomic scale measurement of ferroelectric single crystal.
We performed atomic scale measurement of bismuth layered ferroelectrics Bi_4Ti_3O_<12> and succeeded to resolve the atomic layers.
3. Fundamental study on ferroelectric data storage with the memory density above 1Tbit/inch^2.
We performed a fundamental study on super-high density ferroelectric data strange using scanning nonlinear dielectric microscopy. As a result we succeeded in forming the ultra small ferroelectric single data bit with size of 12 nm which corresponds to 4Tbit/inch^2 in memory density. Also, we succeeded to record actual domain dot array with the real memory density above 1Tbit/inch^2.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] K.Matsuura: "Measurement of the Ferroeletric Domain Distributions Using Nonlinear Dielectric Response and Piezoelectric Response"Jpn.J.Appl.Phys.. 40. 3534-3537 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 長 康雄: "超高分解能走査型非線形誘電率顕微鏡"応用物理. 71. 62-65 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Ohara: "Fundamental Study of Surface Layer on Ferroelectrics by Scanning Nonlinear Dielectric Microscopy"Jpn.J.Appl.Phys.. 40. 5833-5836 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Cho: "Scanning nonlinear dielectric microscopy study on periodically poled LiNbO_3 for high-performance quasi-phase matching devices"Appl.Phys.Lett.. 79. 2955-2957 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.Cho: "Higher Order Nonlinear Dielectric Microscopy"Appl.Phys.Lett.. 79. 3842-3844 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Odagawa: "Measuring of ferroelectric polarization component parallel to the surface by scanning nonlinear dielectric microscopy"Appl.Phys.Lett.. 80. 2159-2161 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K. Matsuura: "Measurement of the Ferroelectric Domain Distributions Using Nonlinear Dielectric Response and Piezoelectric Response"Jpn. J. Appl. Phys.. Vol. 40. 3534-3537 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yasuo Cho: "Scanning nonlinear dielectric microscopy with super-high resolution"Oyobutsuri. Vol. 71. 62-65 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Ohara: "Fundamental Study of Surface Layer on Ferroelectrics by Scanning Nonlinear Dielectric Microscopy"Jpn. J. Appl. Phys.. Vol. 40. 5833-5836 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Cho: "Scanning nonlinear dielectric microscopy study on periodically poled LiNbO_3 for high-performance quasi-phase matching devices"Appl. Phys. Lett.. Vol. 79. 2955-2957 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Cho: "Higher Order Nonlinear Dielectric Microscopy"Appl. Phys. Lett.. Vol. 79. 3842-3844 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H. Odagawa: "Measuring of ferroelectric polarization component parallel to the surface by scanning nonlinear dielectric microscopy"Appl. Phys. Lett.. Vol. 80. 2159-2161 (2002)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2003-09-17  

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