Atomic-scale analysis of the ordering of the strongly correlated electrons by monochromated aberration-corrected TEM/STEM

• Project/Area Number: 26390012
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nanostructural physics
• Research Institution: National Institute for Materials Science
• Principal Investigator: Nagai Takuro 国立研究開発法人物質・材料研究機構, 電子顕微鏡ステーション, 主任エンジニア (90531567)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2015: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
• Keywords: ローレンツ電顕法 / モノクロメータ / 球面収差補正 / ヘリカル反強磁性 / 強相関電子系 / 角度分解EELS / 透過型電子顕微鏡 / HAADF-STEM / STEM-EELS

Outline of Final Research Achievements

We developed high-resolution Lorentz microscopy using monochromator and Cs corrector to realize sub-nanoscale real-space observation of spin magnetic moments. We decreased the information limit of the Lorentz image to 0.6 nm and successfully observed a lattice fringe with the period of 0.62 nm for a layered manganite with no magnetic field applied. Sub-nanoscale observation of temperature-dependent distribution of magnetization in helical antiferromagnetic phase of dysprosium was also performed.

Research Products

• [Journal Article] High-Resolution Lorentz Electron Microscopy Using Monochromator and Cs corrector (2015)
  • Author(s): Takuro Nagai, Koji Inoke, Masaki Takeguchi and Koji Kimoto
  • Journal Title: Microscopy Volume: 64 Issue: suppl 1 Pages: i112.1-i112
  • DOI: 10.1093/jmicro/dfv275
  • Acknowledgement Compliant
• [Journal Article] Experimental observation of multiple-Q states for the magnetic skyrmion lattice and skyrmion excitations under a zero magnetic field (2015)
  • Author(s): Masahiro Nagao, Yeong-Gi So, Hiroyuki Yoshida, Kazunari Yamaura, Takuro Nagai, Toru Hara, Atsushi Yamazaki and Koji Kimoto
  • Journal Title: Phys. Rev. B Volume: 92 Issue: 14 Pages: 140415-140415
  • DOI: 10.1103/physrevb.92.140415
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] 収差補正ローレンツ顕微鏡法による磁場のサブナノスケールイメージング (2017)
  • Author(s): 長井拓郎、木本浩司、伊野家浩司、竹口雅樹
  • Organizer: 共用・計測合同シンポジウム2017
  • Place of Presentation: 物質・材料研究機構千現地区（茨城県つくば市）
• [Presentation] モノクロメータおよびCsコレクターを用いた高分解能ローレンツ電子顕微鏡法 (2016)
  • Author(s): 長井拓郎、伊野家浩司
  • Organizer: 日本顕微鏡学会第72回学術講演会
  • Place of Presentation: 仙台国際センター（宮城県仙台市）
  • Year and Date: 2016-06-14
• [Presentation] High-Resolution Lorentz Electron Microscopy Using Monochromator and Cs corrector (2015)
  • Author(s): 長井拓郎、伊野家浩司、竹口雅樹、木本浩司
  • Organizer: The 2nd East-Asia Microscopy Conference
  • Place of Presentation: 姫路商工会議所,姫路市
  • Year and Date: 2015-11-24
  • Int'l Joint Research
• [Presentation] モノクロメータおよびCsコレクターを用いた高分解能ローレンツ電子顕微鏡法 (2015)
  • Author(s): 長井拓郎、伊野家浩司、竹口雅樹、木本浩司
  • Organizer: 日本顕微鏡学会第71回学術講演会
  • Place of Presentation: 国立京都国際会館,京都市
  • Year and Date: 2015-05-13
• [Presentation] モノクロメータ及びCsコレクターを用いた高分解能ローレンツ電子顕微鏡法の開発 (2015)
  • Author(s): 長井拓郎、伊野家浩司、竹口雅樹、木本浩司
  • Organizer: 共用・計測 合同シンポジウム2015
  • Place of Presentation: 独立行政法人物質・材料研究機構、茨城県つくば市
  • Year and Date: 2015-03-10
• [Presentation] モノクロメータおよび収差補正装置を用いた高分解能ローレンツ電子顕微鏡法 (2014)
  • Author(s): 長井拓郎、伊野家浩司、竹口雅樹、木本浩司
  • Organizer: 日本顕微鏡学会第70回記念学術講演会
  • Place of Presentation: 幕張メッセ国際会議場、千葉県千葉市
  • Year and Date: 2014-05-13