Magnetic resonance force spectroscopy: manipulation of magnetic nanoparticles and non-invasive magnetic potential measurement

• Project/Area Number: 18H01805
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 28010:Nanometer-scale chemistry-related
• Research Institution: Akita University
• Principal Investigator: Yukinori Kinoshita 秋田大学, 理工学研究科, 講師 (10635501)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2021)
• Budget Amount: ¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000); Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2018: ¥15,210,000 (Direct Cost: ¥11,700,000、Indirect Cost: ¥3,510,000)
• Keywords: 磁気力顕微鏡 / 磁気共鳴 / 磁性ナノ粒子 / 粒子操作 / 磁気相互作用 / マイクロ波 / 水晶振動子 / ナノ磁性粒 / マニピュレーション / 力分光

Outline of Final Research Achievements

We successfully developed a novel magnetic force microscopy technique and enabled non-invasive magnetic observation by utilizing magnetic resonance of magnetic tip. First, we clarified the characteristics of microwave resonator and transmission lines necessary for exciting the magnetic resonances of magnetic tip. Second, we developed a detection method to effectively extract the magnetic resonance frequency of the magnetic tip by detecting the shift of the tip mechanical vibration. Finally, the magnetic domain structure imaging was demonstrated with nanometer scale spatial resolution by optimizing microwave power and modulation conditions for high-sensitive detection of magnetic resonance forces.

Academic Significance and Societal Importance of the Research Achievements

ナノメートルサイズの微小な磁性体はバルクの磁性体にはない優れた磁気特性を有する。一方で、その物理構造と磁気特性を高精度に同時に得ることができる計測手法は、まだ確立されているとは言い難い。本研究の成果は、汎用性に優れる磁気イメージングツールである磁気力顕微鏡にナノ磁性体の観察に必要な非侵襲性を付与するものであり、学術的には、ナノメートル領域の磁気物理を大きく進展させる可能性があるほか、実用的には、ハードディスクドライブに代表される磁気記録デバイスの記録密度や消費電力を飛躍的に向上させる新たな情報ビット記録方式の開拓につながると期待される。

Research Products

• [Presentation] Improving Q factor of mass unbalanced quartz tuning fork force sensor with dual piezo excitation (2021)
  • Author(s): Yoshiki Kamo and Yukinori Kinoshita
  • Organizer: 29th International Colloquium on Scanning Probe Microscopy
  • Int'l Joint Research
• [Presentation] Microwave Magnetic Field Waveguide Antenna for Ferromagnetic Resonance Force Microscopy (2019)
  • Author(s): Yukinori Kinoshita
  • Organizer: 27th International Colloquium on Scanning Probe Microscopy (ICSPM27)
  • Int'l Joint Research
• [Presentation] Development of High AC/DC Magnetic Field Magnetic Force Microscopy for Modulation Detection of Magnetic Interaction (2018)
  • Author(s): Yukinori Kinoshita
  • Organizer: Joint conference of 14th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures (ACSIN-14)/26th International colloquium on Scanning Probe Microscopy (ICSPM26)
  • Int'l Joint Research
• [Presentation] Nano-scale Perpendicular Stray Field Imaging on Recording Bits of Hard Disk Drive Using Force Modulation Magnetic Force Microscopy (2018)
  • Author(s): Yukinori Kinoshita
  • Organizer: Joint conference of 14th International Conference on Atomically Controlled Surfaces, Interfaces and Nanostructures (ACSIN-14)/26th International colloquium on Scanning Probe Microscopy (ICSPM26)
  • Int'l Joint Research