Systematic study on spin-Seebeck effect and interaction between heat currents and spins

2011 Fiscal Year Final Research Report

• Project/Area Number: 21244058
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Condensed matter physics II
• Research Institution: Tohoku University
• Principal Investigator: SAITOH Eiji 東北大学, 金属材料研究所, 教授 (80338251)
• Co-Investigator(Kenkyū-buntansha): FUJIKAWA Yasunori 東北大学, 金属材料研究所, 准教授 (70312642) ; IEDA Junichi 独立行政法人日本原子力研究開発機構, 先端基礎研究センター, 研究員 (20463797)
• Project Period (FY): 2009 – 2011
• Keywords: スピンゼーベック効果 / スピントロニクス / スピン流 / 熱電効果

Research Abstract

Our systematic experimental and theoretical studies on thermo spintronics reveal that the microscopic origin of the spin-Seebeck effect is a"thermal spin pumping" driven by non-reciprocity and fluctuations of spins. By using this novel mechanism to generate spin currents, we successfully observed the spin-Seebeck effect in insulators and sound-wave-driven spin currents.

Research Products

• [Journal Article] Long-range spin Seebeck effect and acoustic spin pumping (2011)
  • Author(s): K. Uchida, H. Adachi, T. An, T. Ota, M. Toda, B. Hillebrands, S. Maekawa, and E. Saitoh
  • Journal Title: Nature Materials 10 Volume: 10 Pages: 737-741
  • Peer Reviewed
• [Journal Article] Electrically tunable spin injector free from the impedance mismatch problem (2011)
  • Author(s): K. Ando, S. Takahashi, J. Ieda, H. Kurebayashi, T. Trypiniotis, C. H. W. Barnes, S. Maekawa, E. Saitoh
  • Journal Title: Nature Materials Volume: 10 Pages: 655-659
  • Peer Reviewed
• [Journal Article] Spin Seebeck insulator (2010)
  • Author(s): K. Uchida, J. Xiao, H. Adachi, J. Ohe, S. Takahashi, J. Ieda, T. Ota, Y. Kajiwara, H. Umezawa, H. Kawai, G. E. W. Bauer, S. Maekawa, and E. Saitoh
  • Journal Title: Nature Materials Volume: 9 Pages: 894-897
  • Peer Reviewed
• [Presentation] Spin current physics and application (2011)
  • Author(s): E. Saitoh
  • Organizer: The 7th International Conference on Advanced Materials and Devices
  • Place of Presentation: Jeju
  • Year and Date: 2011-12-07
• [Presentation] Spin pumping and spin Seebeck effect (2011)
  • Author(s): E. Saitoh
  • Organizer: American Physical Society March Meeting 2012
  • Place of Presentation: Boston
  • Year and Date: 2011-12-07
• [Presentation] Spin current coupled with charge and heat currents (2010)
  • Author(s): E. Saitoh
  • Organizer: The IEEE 7th International Symposium on Metallic Multilayers
  • Place of Presentation: Berkeley
  • Year and Date: 2010-09-19
• [Book] 「スピンゼーベック効果と絶縁体を用いた熱電発電」in 熱電変換技術の基礎と応用-クリーンなエネルギー社会をめざして- (2011)
  • Author(s): 齊藤英治、内田健一
  • Total Pages: 13-23
  • Publisher: シーエムシー出版
• [Remarks]
  • URL: http://saitoh.imr.tohoku.ac.jp/
• [Patent(Industrial Property Rights)] 音波-スピン流変換素子 (2011)
  • Inventor(s): 齊藤英治、内田健一
  • Industrial Property Rights Holder: 学校法人慶應義塾
  • Industrial Property Number: 特願、2011-052393
  • Filing Date: 2011-03-10
• [Patent(Industrial Property Rights)] 位置検出装置 (2011)
  • Inventor(s): 桐原明宏、石田真彦、中村泰信、内田健一、齊藤英治
  • Industrial Property Rights Holder: 東北大学・日本電気株式会社
  • Industrial Property Number: 特願、2011-173785
  • Filing Date: 2011-08-09
• [Patent(Industrial Property Rights)] 熱電変換素子及び熱電変換装置 (2010)
  • Inventor(s): 内田健一、齊藤英治
  • Industrial Property Rights Holder: 学校法人慶應義塾
  • Industrial Property Number: 特願、2010-195508
  • Filing Date: 2010-09-01