oxide spintronics and aplication

• Project/Area Number: 26790038
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Applied materials
• Research Institution: Tohoku University
• Principal Investigator: Qiu Zhiyong 東北大学, 原子分子材料科学高等研究機構, 助教 (30516414)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2014: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
• Keywords: スピントロニクス / スピン流 / 磁性 / 酸化物 / スピンポンピング

Outline of Final Research Achievements

In this work, spin-charge conversion and spin transport have been investigated from the viewpoint of physics and experiment. The final goal of our research is the realization of the new energy saving information process device.
Investigated of spin current has been limited to metals and semiconductors. In this work, we tried to expand the stage of spintronic materials. Many new materials, including conductive oxide, have been studied. The conversion efficiency between spin and charge has been improved by both material science and processing technique. Those results also contributed for the understanding of the physics of spin-charge conversion.
By using the new materials and processes, some new type spintronics devices were developed and investigated.

Research Products

• [Journal Article] Origin of the spin Seebeck effect in compensated ferrimagnets (2016)
  • Author(s): S. Geprgs, A. Kehlberger, F. D. Coletta, Z. Qiu, E. J. Guo, T. Schulz, C. Mix, S. Meyer, A. Kamra, M. Althammer, H. Huebl, G. Jakob, Y. Ohnuma, H. Adachi, J. Barker, S. Maekawa, G. E. W. Bauer, E. Saitoh, R. Gross, S. T. B. Goennenwein, and M. Klaeui
  • Journal Title: Nature Communications Volume: 7 Issue: 1 Pages: 10452-10452
  • DOI: 10.1038/ncomms10452
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Critical suppression of spin Seebeck effect by magnetic fields (2015)
  • Author(s): T. Kikkawa, K. Uchida, S. Daimon, Z. Qiu, Y. Shiomi, and E. Saitoh,
  • Journal Title: Physical Review B Volume: 92 Issue: 6 Pages: 064413-064413
  • DOI: 10.1103/physrevb.92.064413
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Enhancement of anomalous Nernst effects in metallic multilayers free from proximity-induced magnetism (2015)
  • Author(s): K. Uchida, T. Kikkawa, T. Seki, T. Oyake, J. Shiomi, Z. Qiu, K. Takanashi, and E. Saitoh,
  • Journal Title: Physical Review B Volume: 92 Issue: 9 Pages: 094414-094414
  • DOI: 10.1103/physrevb.92.094414
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Intrinsic surface magnetic anisotropy in Y3Fe5O12 as the origin of low-magnetic-field behavior of the spin Seebeck effect (2015)
  • Author(s): K. Uchida, J. Ohe, T. Kikkawa, S. Daimon, D. Hou, Z. Qiu, E. Saitoh
  • Journal Title: Physical Review B Volume: 92 Issue: 1 Pages: 014415-014415
  • DOI: 10.1103/physrevb.92.014415
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Generation of spin currents by surface plasmon resonance (2015)
  • Author(s): K. Uchida, H. Adachi, D. Kikuchi, S. Ito, Z. Qiu, S. Maekawa, and E. Saitoh
  • Journal Title: Nature communications Volume: 6 Issue: 1 Pages: 5910-5910
  • DOI: 10.1038/ncomms6910
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Influence of the interface condition on spin-Seebeck effects (2015)
  • Author(s): Z. Qiu, D. Hou, K. Uchida, E. Saitoh
  • Journal Title: Journal of Physics D: Applied Physics Volume: 48 Issue: 16 Pages: 164013-164013
  • DOI: 10.1088/0022-3727/48/16/164013
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Observation of inverse spin Hall effect in ferromagnetic FePt alloys using spin Seebeck effect (2015)
  • Author(s): T. Seki, K. Uchida, T. Kikkawa, Z. Qiu, E. Saitoh, and K. Takanashi,
  • Journal Title: Applied Physics Letters Volume: 107 Issue: 9 Pages: 092401-092401
  • DOI: 10.1063/1.4929691
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Suppression of martensitic transformation in Fe50Mn23Ga27 by local symmetry breaking (2015)
  • Author(s): T. Ma, X. Liu, M. Yan, C. Wu, S. Ren, H. Li, M. Fang, Z. Qiu, and X. Ren
  • Journal Title: Appl. Phys. Lett. Volume: 106 Issue: 21 Pages: 211903-211903
  • DOI: 10.1063/1.4921928
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] All-oxide spin Seebeck effects (2015)
  • Author(s): Z. Qiu, D. Hou, K. Uchida, and E. Saitoh,
  • Journal Title: Applied Physics Express Volume: 8 Issue: 8 Pages: 083001-083001
  • DOI: 10.7567/apex.8.083001
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Enhancement of spin-Seebeck effect by inserting ultra-thin Fe70Cu30 interlayer (2015)
  • Author(s): D. Kikuchi, M. Ishida, K. Uchida, Z. Qiu, T. Murakami, and E. Saitoh
  • Journal Title: Applied Physics Letters Volume: 106 Issue: 8 Pages: 082401-082401
  • DOI: 10.1063/1.4913531
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Spin Hall magnetoresistance at high temperatures (2015)
  • Author(s): K. Uchida, Z. Qiu, T. Kikkawa, R. Iguchi, and E. Saitoh
  • Journal Title: Applied Physics Letters Volume: 106 Issue: 5 Pages: 052405-052405
  • DOI: 10.1063/1.4907546
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Spin-current injection and detection in κ-(BEDT-TTF)2Cu[N(CN)2]Br (2015)
  • Author(s): Z. Qiu, M. Uruichi, D. Hou, K. Uchida, H. M. Yamamoto, and E. Saitoh,
  • Journal Title: AIP Advances Volume: 5 Issue: 5 Pages: 057167-057167
  • DOI: 10.1063/1.4922007
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Interface-dependent magnetotransport properties for thin Pt films on ferrimagnetic Y3Fe5O12 (2014)
  • Author(s): Y. Shiomi, T. Ohtani, S. Iguchi, T. Sasaki, Z. Qiu, H. Nakayama, K. Uchida, and E. Saitoh
  • Journal Title: Applied Physics Letters Volume: 104 Pages: 242406-242406
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Spin current generation from sputtered Y3Fe5O12 films (2014)
  • Author(s): J. Lustikova, Y. Shiomi, Z. Qiu, T. Kikkawa, R. Iguchi, K. Uchida, and E. Saitoh
  • Journal Title: Journal of Applied Physics Volume: 111 Issue: 15 Pages: 153902-153902
  • DOI: 10.1063/1.4898161
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] Electric probe for spin transition and fluctuation (2016)
  • Author(s): Zhiyong Qiu
  • Organizer: APS March meeting
  • Place of Presentation: Baltimore (USA)
  • Year and Date: 2016-03-13
  • Int'l Joint Research
• [Presentation] Electric probe for spin transition and fluctuation (2016)
  • Author(s): Zhiyong Qiu
  • Organizer: AMIS2016
  • Place of Presentation: Tohoku univercity (Sendai, Miyagi, Japan)
  • Year and Date: 2016-02-22
  • Int'l Joint Research
• [Presentation] Electric detection of spin fluctuation (2015)
  • Author(s): Zhiyong Qiu
  • Organizer: EMNHongkong2015
  • Place of Presentation: Hongkong (China)
  • Year and Date: 2015-12-09
  • Int'l Joint Research / Invited
• [Presentation] Electric probe for spin transition and fluctuation (2015)
  • Author(s): Zhiyong Qiu
  • Organizer: PASPA20 2015
  • Place of Presentation: Tohoku univercity (Sendai, Miyagi, Japan)
  • Year and Date: 2015-09-26
  • Int'l Joint Research
• [Presentation] Electric detection of spin fluctuation (2015)
  • Author(s): Zhiyong Qiu
  • Organizer: CPS2015
  • Place of Presentation: Changchun (China)
  • Year and Date: 2015-09-10
  • Int'l Joint Research
• [Presentation] Electric Neel temperature determination of an antiferromagnetic insulator film (2015)
  • Author(s): Z. Qiu
  • Organizer: The AIMR International Symposium 2015
  • Place of Presentation: Sendai (Japan)
  • Year and Date: 2015-02-17 – 2015-02-19
• [Presentation] Investigation of inverse spin-Hall effect of bismuth oxide (2014)
  • Author(s): Z. Qiu
  • Organizer: The 3rd International Conference of AUMS
  • Place of Presentation: Haikou (China)
  • Year and Date: 2014-10-29 – 2014-10-31
• [Presentation] 全酸化物系におけるスピンゼーベック効果 (2014)
  • Author(s): 邱志勇
  • Organizer: 日本物理学会2014年度秋季大会
  • Place of Presentation: 名古屋市
  • Year and Date: 2014-09-07 – 2014-09-10
• [Presentation] Inverse spin Hall effect for conductive oxides (2014)
  • Author(s): Z. Qiu
  • Organizer: International Conference on Advanced Materials Development and Performance 2014
  • Place of Presentation: Busan (Korean)
  • Year and Date: 2014-07-17 – 2014-07-20
  • Invited