Spin Torque Oscillator using giant pure spin current

• Project/Area Number: 26630162
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Electron device/Electronic equipment
• Research Institution: Kyushu University
• Principal Investigator: Kimura Takashi 九州大学, 理学研究院, 教授 (80360535)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 自励発振 / スピン流 / 純スピン流 / スピンダイナミクス / スピントルク

Outline of Final Research Achievements

We have developed a lateral spin valve based on nano-pillar shaped ferromagnetic dots.　　We demonstrated that a giant pure spin current can be generated by using this device and that the magnetization reversal and steady state precession.

Research Products

• [Journal Article] Large spin current injection in nano-pillar-based lateral spin valve (2016)
  • Author(s): T. Nomura, K. Ohnishi, and T. Kimura
  • Journal Title: AIP Conf. Proc. Volume: 1763 Pages: 020011-020011
  • DOI: 10.1063/1.4961344
  • Peer Reviewed / Open Access
• [Journal Article] Large spin current injection in nano-pillar-based lateral spin valve (2016)
  • Author(s): T. Nomura, K. Ohnishi and T. Kimura
  • Journal Title: AIP Conference Series Volume: 000 Pages: 000-000
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Inverse spin Hall effect in Pt/(Ga,Mn)As (2015)
  • Author(s): H. Nakayama, L. Chen, H.W. Chang, H. Ohno, and F. Matsukura
  • Journal Title: Applied Physics Letters Volume: 106 Pages: 28-32
  • DOI: 10.1016/j.physe.2015.08.038
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Spin currents injected electrically and thermally from high spin polarized Co2MnSi (2015)
  • Author(s): A. Pfeiffer, S. Hu, R. M. Reeve, A. Kronenberg, M. Jourdan, T. Kimura, and M. Klaui
  • Journal Title: Applied Physics Letters Volume: 107 Issue: 8 Pages: 82401-82401
  • DOI: 10.1063/1.4929423
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Geometrical optimization of a local ballistic magnetic sensor (2014)
  • Author(s): Y. Kanda, T. Nomura, T. Kimura, and M. Hara
  • Journal Title: Applied Physics Letters Volume: 104 Issue: 14 Pages: 142408-142408
  • DOI: 10.1063/1.4871002
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Efficient thermal spin injection using CoFeAl nanowire (2014)
  • Author(s): S. Hu, H. Itoh and T. Kimura
  • Journal Title: NPG Asia Mater Volume: 6 Issue: 9 Pages: e127-e127
  • DOI: 10.1038/am.2014.74
  • Peer Reviewed / Open Access
• [Presentation] Efficient thermal spin injection based on metallic hybrid nanostructures (2017)
  • Author(s): Takashi Kimura
  • Organizer: SPINTRONICS_AND_CORE-TO-CORE_WORKSHOP
  • Place of Presentation: 大阪
  • Year and Date: 2017-03-21
  • Invited
• [Presentation] 強磁性/非磁性複合ナノ構造における 高効率熱スピン注入とその応用 (2017)
  • Author(s): 木村崇
  • Organizer: 第31回光機能性デバイス・材料専門研究会
  • Place of Presentation: 千葉
  • Invited
• [Presentation] Efficient spin injection in metallic hybrid structure (2016)
  • Author(s): T. Kimura
  • Organizer: EMN magnetic materials
  • Place of Presentation: USA
  • Year and Date: 2016-03-21
  • Int'l Joint Research / Invited
• [Presentation] Large spin-dependent thermoelectric effects using CoFe-based alloy (2015)
  • Author(s): T. Kimura
  • Organizer: International Conference and Exhibition on Mesoscopic & Condensed Matter Physics
  • Place of Presentation: USA
  • Year and Date: 2015-06-22
  • Int'l Joint Research / Invited
• [Presentation] 横型スピンバルブ素子における熱流の影響と熱流を用いた高効率スピン流生成 (2015)
  • Author(s): 木村崇
  • Organizer: 日本磁気学会
  • Place of Presentation: 東京
  • Year and Date: 2015-03-18
  • Invited
• [Presentation] 強磁性-常磁性 複合ナノ構造におけるスピン流の電気的、及び熱的制御 (2014)
  • Author(s): 木村崇
  • Organizer: 応用物理学会
  • Place of Presentation: 東京
  • Year and Date: 2014-11-25
  • Invited
• [Presentation] Highly efficient thermal spin injection using CoFeAl injector (2014)
  • Author(s): 木村崇
  • Organizer: Nano S&T
  • Place of Presentation: 中国
  • Year and Date: 2014-10-29 – 2014-10-31
  • Invited