Development of Soft-X-ray Dichroism Detecting ESR and Application to Surface-Interface Magnetism

• Project/Area Number: 25610086
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: NOJIRI Hiroyuki 東北大学, 金属材料研究所, 教授 (80189399)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
• Keywords: 磁性 / 表面 / XMCD / 強磁場 / ESR

Outline of Final Research Achievements

We have developed a new magnetization-detecting type Electron Spin Resonance equipment by combining soft-X-ray magnetic dichroism and microwave resonant-cavities. For the estimate of the absolute sensitivity, we have also assembled a SQUID-ESR-equipment and evaluated the absolute value of the magnetization reversal in on-resonance states. We have succeeded in the observation of the XMCD signal change at the resonance state of a Fe-polycrystalline thin film. The XMCD signal change is found to be smaller than the estimated bulk magnetization reversal and the influence of the surface effect and/or the sample oxidization are examined. It is also turned out that the modulation detection is needed in XMCD measurement to suppress the baseline fluctuation, which limit the sensitivity of the system.

Research Products

• [Journal Article] A Ferromagnetically Coupled Fe42 Cyanide-Bridged Nanocage (2015)
  • Author(s): S. Kang, H. Zheng, T. Liu, K. Hamachi, S. Kanegawa, K. Sugimoto, Y. Shiota, S. Hayami, M. Mito, T. Nakamura, M. Nakano, M. Baker, H. Nojiri, K. Yoshizawa, C. Duan, and O. Sato
  • Journal Title: Nature Communications Volume: 6 Issue: 1 Pages: 5955-5955
  • DOI: 10.1038/ncomms6955
  • Peer Reviewed / Open Access
• [Journal Article] Structural Tailoring Effects on the Magnetic Behavior of Symmetric and Asymmetric Cubane-Type Ni Complexes (2013)
  • Author(s): A. N. Ponomaryov, N. Kim, J. Hwang, H. Nojiri, J. van Tol, A. Ozarowski, J. Park, Z. Jang, B. Suh, S. Yoon and K. -Y. Choi
  • Journal Title: Chem. Asian J. Volume: 8 Issue: 6 Pages: 1152-1159
  • DOI: 10.1002/asia.201300054
  • Peer Reviewed
• [Presentation] Development of Magnetization Detecting Electron Spin Resonance Method (2015)
  • Author(s): S. Matsuzawa and H. Nojiri
  • Organizer: APS March Meeting 2015
  • Place of Presentation: San Antonio (USA)
  • Year and Date: 2015-03-02 – 2015-03-06
• [Presentation] Development of Magnetization and XMCD Detection ESR (2014)
  • Author(s): H. Nojiri and S. Matsuzawa
  • Organizer: Joint Conference of Asia-Pacific EPR/ESR Symposium(APES2014)・International EPR (ESR) Society Symposium(IES)・the 53th The Society of Electron Spin Science and Technology (SEST2014)
  • Place of Presentation: Todaiji Culture Center (奈良県奈良市)
  • Year and Date: 2014-11-12 – 2014-11-16
• [Presentation] Fast Spin Reversal at Level Crossing and EPR Line Width (2014)
  • Author(s): H. Nojiri and S. Matsuzawa
  • Organizer: Fujihara Seminar: Real-time Dynamics of Physical Phenomena and Manipulation by External Fields (2014RTDYN)
  • Place of Presentation: Grand Hotel New Oji (北海道苫小牧市)
  • Year and Date: 2014-09-23 – 2014-09-27
  • Invited
• [Presentation] 磁化検出ESR法の開発 (2014)
  • Author(s): 松澤智, 野尻浩之
  • Organizer: 日本物理学会2014年秋季大会
  • Place of Presentation: 中部大学 (愛知県春日井市)
  • Year and Date: 2014-09-07 – 2014-09-10
• [Presentation] Multi-property Control in Charge Transfer Spin Crossover System (2014)
  • Author(s): H. Nojiri
  • Organizer: The 14th International Conference on Molecule-Based Magnets (ICMM2014)
  • Place of Presentation: Saint Petersburg (Russia)
  • Year and Date: 2014-07-05 – 2014-07-09
• [Presentation] THz Electron Spin Resonance in Pulsed Magnets (2014)
  • Author(s): H. Nojiri
  • Organizer: The 3rd Russia-Japan-USA Symposium on Fundamental & Applied Problems of Terahertz Devices & Technologies RJUS TeraTech-2014
  • Place of Presentation: Buffalo (USA)
  • Year and Date: 2014-06-18 – 2014-06-20
  • Invited
• [Presentation] Exchange Coupling of Rare-Earth-Radical Hetero-Spin Magnetic Clusters-ESR and Neutron Scattering Study (2013)
  • Author(s): T. Tanaka, M. Baker, H. Nojiri and T. Ishida
  • Organizer: The 12th Asia Pacific Physics Conference (APPC2013)
  • Place of Presentation: Makuhari, Japan
• [Presentation] XMCDとESRによるFe42クラスターの巨大スピン基底状態の研究 (2013)
  • Author(s): 野尻浩之, Michael L. Baker, 田中卓也, 松澤智, 鳴海康雄, 中村哲也, 佐藤治
  • Organizer: 第52回電子スピンサイエンス学会年会(SEST2013)
  • Place of Presentation: 大宮ソニックシティ, さいたま市
• [Remarks] 磁気物理学研究室HP
  • URL: http://www.hfpm.imr.tohoku.ac.jp/
• [Remarks] 磁気物理学研究室HP
  • URL: http://www.hfpm.imr.tohoku.ac.jp/