Nanoscale measurements of ferroelectric thin films using scanning nonlinear dielectric microscopy for next-generation ultrahigh-density data storage devices

• Project/Area Number: 21760245
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Electron device/Electronic equipment
• Research Institution: Tohoku University
• Principal Investigator: HIRANAGA Yoshiomi 東北大学, 電気通信研究所, 助教 (70436161)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2011: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 走査プローブ顕微鏡 / データストレージ / 誘電体物性 / 走査型プローブ顕微鏡

Research Abstract

Several experiments of nanoscale domain switching on ferroelectric thin films were conducted in order to develop ferroelectric thin films for high-density data storage. Major achievements of this study are as follows :(1)Artificial small nanodomain dots with the diameter of approximately 20 nm were successfully formed on an epitaxial LiTaO_3 thin film prepared by MOCVD method. A domain dot array with the density of 1. 6 Tbit/inch^2 was also formed on the same thin film.(2)Intermittent contact scanning nonlinear dielectric microscopy (IC-SNDM)was developed for study on nanoscale domain switching on ferroelectric thin films. The reproducibility of measurements was improved in comparison to a conventional SNDM operated under contact mode.(3)Single track read/write operations were demonstrated using our HDD-type ferroelectric data storage testing system.

Research Products

• [Journal Article] Intermittent contact scanning nonlinear dielectric microscopy (2010)
  • Author(s): Yoshiomi Hiranaga and Yasuo Cho
  • Journal Title: Rev. Sci. Instrum. Volume: Vol.81No.2
  • Peer Reviewed
• [Journal Article] Intermittent contact scanning nonlinear dielectric microscopy (2010)
  • Author(s): Yoshiomi Hiranaga, Yasuo Cho
  • Journal Title: REVIEW OF SCIENTIFIC INSTRUMENTS 81
  • Peer Reviewed
• [Presentation] 強誘電体ドメインのナノスケール選択エッチング (2011)
  • Author(s): 平永良臣, 長康雄
  • Organizer: 第58回応用物理学関係連合講演会
  • Place of Presentation: 神奈川工科大学
  • Year and Date: 2011-03-26
• [Presentation] 強誘電体回転ディスク記録方式におけるシングルトラック記録・再生 (2011)
  • Author(s): 木本康宏, 平永良臣, 長康雄
  • Organizer: 第58回応用物理学関係連合講演会
  • Place of Presentation: 神奈川工科大学
  • Year and Date: 2011-03-26
• [Presentation] 強誘電体ディスクリート記録媒体に関する基礎的研究 (2011)
  • Author(s): 隅山直樹, 平永良臣, 長康雄
  • Organizer: 第58回応用物理学関係連合講演会
  • Place of Presentation: 神奈川工科大学
  • Year and Date: 2011-03-26
• [Presentation] Ferroelectric Super-High Density Data Storage Based on Scanning Nonlinear Dielectric Microscopy (2010)
  • Author(s): Yasuo Cho, Kenkou Tanaka, and Yoshiomi Hiranaga
  • Organizer: The 3rd International Symposium on Innovations in Advanced Materials for Optics & Electronics
  • Place of Presentation: 富山
  • Year and Date: 2010-10-18
• [Presentation] Development of Ferroelectric Data Storage Test System for High-Density and High-Speed Read/Write (2009)
  • Author(s): Y. Hiranaga, K. Tanaka, T. Uda, Y. Kurihashi, Y. Kimoto, H. Tochishita, M. Kadota, Y. Cho
  • Organizer: 2009 MRS fall meeting
  • Place of Presentation: ボストン
  • Year and Date: 2009-12-03
• [Presentation] Development of Ferroelectric Data Storage Test System for High-Density and High-Speed Read/Write (2009)
  • Author(s): Y.Hiranaga, K.Tanaka, T.Uda, Y.Kurihashi, Y.Kimoto, H.Tochishita, M.Kadota, Y.Cho
  • Organizer: 2009 MRS fall meeting
  • Place of Presentation: ボストン(アメリカ合衆国)
  • Year and Date: 2009-12-03
• [Presentation] Nano-Domain Formation on Ferroelectrics and Development of HDD-Type Ferroelectric Data Storage Test System (2009)
  • Author(s): Yoshiomi Hiranaga, Tomoya Uda, Yuichi Kurihashi, Yasuo Cho, Michio Kadota and Hikari Tochisita
  • Organizer: 21st International Symposium on Integrated Ferroelectrics and Functionalities
  • Place of Presentation: コロラドスプリングス
  • Year and Date: 2009-09-29
• [Presentation] Nano-Domain Formation on Ferroelectrics and Development of HDD-Type Ferroelectric Data Storage Test System (2009)
  • Author(s): 平永良臣, 夘田知也, 栗橋悠一, 長康雄, 門田道雄, 栃下光
  • Organizer: 21^<st> International Symposium on Integrated Ferroelectrics and Functionalities
  • Place of Presentation: コロラドスプリングス(アメリカ合衆国)
  • Year and Date: 2009-09-29
• [Presentation] 強誘電ナノ分極反転とHDD型強誘電体記録デバイスの開発 (2009)
  • Author(s): 平永良臣, 夘田知也, 栗橋悠一, 長康雄, 門田道雄, 栃下光
  • Organizer: 第26回強誘電体応用会議
  • Place of Presentation: 京都
  • Year and Date: 2009-05-30