Control of Spin Transport in Organic Semiconductors

• Project/Area Number: 23350091
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Functional materials/Devices
• Research Institution: Osaka University
• Principal Investigator: TADA Hirokazu 大阪大学, 基礎工学研究科, 教授 (40216974)
• Co-Investigator(Kenkyū-buntansha): KAWASUGI Yoshitaka 大阪大学, 大学院・基礎工学研究科, 助教 (40590964)
• Project Period (FY): 2011-04-01 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥20,020,000 (Direct Cost: ¥15,400,000、Indirect Cost: ¥4,620,000); Fiscal Year 2013: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2012: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000); Fiscal Year 2011: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
• Keywords: 有機半導体 / スピントロニクス / 有機スピントロニクス / 磁気抵抗効果 / スピンバルブ / エレクトロニクス / 強磁性電極 / 界面

Research Abstract

We have studied magnetoresitance in the non-local spin valves based on single crystals of organic conductors. We observed non-local magnetoresistance at the antiparallel configuration of the ferromagnetic electrodes with spacings of a few hundreds nm. The spin diffusion length and spin relaxation time were estimated to be 1100 nm and 3 ns, respectively.
We prepared layered spin-valve devices consisting of Co, organic films and Co2MnSi, of which the magnetoresitance was approximately 7 % at room temperature.

Research Products

• [Journal Article] Magneto luminescence of light-emitting field-effect transistors based on alpha sexithiophene (2014)
  • Author(s): S. T. Pham and H. Tada
  • Journal Title: Appl. Phys. Lett. Volume: 104 Issue: 13 Pages: 1333301-1333301
  • DOI: 10.1063/1.4870407
  • Peer Reviewed / Open Access
• [Journal Article] Organic Magnetoresistance in Ambipolar Field-effect Transistors (2013)
  • Author(s): S. T. Pham, Y. Kawasugi and H. Tada
  • Journal Title: Appl. Phys. Lett. Volume: 103 Issue: 14 Pages: 143301-143301
  • DOI: 10.1063/1.4823708
  • Peer Reviewed / Open Access
• [Journal Article] Room-temperature magnetoresistance in organic spin-valves based on a Co2MnSi Heusler alloy (2013)
  • Author(s): Y. Kawasugi, T. Ujino and H. Tada
  • Journal Title: Org. Electron. Volume: 14 Issue: 12 Pages: 3186-3189
  • DOI: 10.1016/j.orgel.2013.09.002
• [Journal Article] Preparation of lateral spin-valve structure using doped conducting polymer poly (3, 4-ethylene dioxythiophene) poly(styrenesulfonate) (2013)
  • Author(s): Y. Kawasugi, M. Ara, H. Ushirokita, T. Kamiya and H. Tada
  • Journal Title: Org. Electron. Volume: 14 Issue: 7 Pages: 1869-1873
  • DOI: 10.1016/j.orgel.2013.04.026
  • Peer Reviewed
• [Journal Article] Electrostatic Properties of Organic Monolayers on Silicon Oxides Studied by Kelvin Probe Force Microscopy (2012)
  • Author(s): R. Mishima, T. L. Ngyuen, and H. Tada
  • Journal Title: Jpn. J. Appl. Phys. Volume: 51 Issue: 4R Pages: 45702-45702
  • DOI: 10.1143/jjap.51.045702
  • NAID: 40019231340
  • Peer Reviewed
• [Journal Article] Electrostatic Properties of Organic Monolayers on Silicon Oxides Studied by Kelvin Probe Force Microscopy (2012)
  • Author(s): Ryota Mishima
  • Journal Title: Jpn.J.Appl.Phys. Volume: 51(印刷中)
  • Peer Reviewed
• [Journal Article] Side-chain effects on electronic structure and molecular stacking arrangement of PCBM spin-coated films (2011)
  • Author(s): P.F.Bazylewski
  • Journal Title: Chem.Phys.Lett. Volume: 508 Issue: 1-3 Pages: 90-94
  • DOI: 10.1016/j.cplett.2011.04.017
  • Peer Reviewed
• [Journal Article] Air-Stable n-Type Organic Field-Effect Transistors Based on Solution-Processable, Electronegative Oligomers Containing Dicyanomethylene-Substituted Cyclopenta[b]thiophene (2011)
  • Author(s): Y.Ie, K.Nishida, M.Karakawa, H.Tada, A.Asano, A.Saeki, S.Seki, Y.Aso
  • Journal Title: Chem.Eur.J. Volume: 17 Issue: 17 Pages: 4750-4758
  • DOI: 10.1002/chem.201002995
  • Peer Reviewed
• [Journal Article] Scanning tunneling spectroscopy of fluorinated phthalocyanine molecules on magnetic metal surfaces (2011)
  • Author(s): Masaki Takada
  • Journal Title: Chem.Phys.Lett. Volume: 514 Issue: 1-3 Pages: 94-97
  • DOI: 10.1016/j.cplett.2011.08.020
  • Peer Reviewed
• [Presentation] ホイスラー合金Co2MnSiの表面磁気光学カー効果測定 (2014)
  • Author(s): 上田大貴, 宇治野智大, 夛田博一
  • Organizer: 第61回応用物理学会春季学術講演会
  • Place of Presentation: 相模原市
  • Year and Date: 2014-03-18
• [Presentation] Study of the organic magnetoresistance (OMAR) effect by impedance spectroscopy (2014)
  • Author(s): M. Fayolle, S. T. Pham and H. Tada
  • Organizer: Nano and Giga Challenges in Electronics, Photonics and Renewable Energy
  • Place of Presentation: Phoenix, USA
  • Year and Date: 2014-03-14
• [Presentation] Nonlocal Magnetoresistance in Organic Spin Valves Based on an Organic Conductor alpha-(BEDT-TTF) 2I3 (2014)
  • Author(s): T. Kamiya, Y. Kawasugi, M. Ara and H. Tada
  • Organizer: Nano and Giga Challenges in Electronics, Photonics and Renewable Energy
  • Place of Presentation: Phoenix, USA
  • Year and Date: 2014-03-14
• [Presentation] Nonlocal Magnetoresistance in Organic Spin Valves Based on an Organic Conductor alpha-(BEDT-TTF)2I3 (2014)
  • Author(s): Takeshi Kamiya, Yoshitaka Kawasugi, Masato Ara and Hirokazu Tada
  • Organizer: Nano and Giga Challenges in Electronics, Photonics and Renewable Energy
  • Place of Presentation: Phoenix, USA
• [Presentation] Influence of traps on PCBM Organic Magnetoresistance studied by Impedance Spectroscopy (2013)
  • Author(s): M. Fayolle , T. Komoda , H. Tada
  • Organizer: 第73回応用物理学会学術講演会
  • Place of Presentation: 京田辺市
  • Year and Date: 2013-09-17
• [Presentation] 非局所スピンバルブ測定による分子性導体(BEDT-TTF)2I3塩へのスピン注入検証 (2013)
  • Author(s): 神谷建, 川椙義高, 荒正人, 夛田博一
  • Organizer: 第73回応用物理学会学術講演会
  • Place of Presentation: 京田辺市
  • Year and Date: 2013-09-16
• [Presentation] Spin Injection and Detection in Organic Conductors by the Non-local Spin Valve Measurement (2013)
  • Author(s): T. Kamiya, Y. Kawasugi, M. Ara and H. Tada
  • Organizer: 2013 Korea-Japan Molecular Electronics Symposium
  • Place of Presentation: Seoul
  • Year and Date: 2013-07-10
• [Presentation] Effect of annealing of PCBM on its organic magnetoresistance (2013)
  • Author(s): M. Fayolle, Y. Kawasugi, and H. Tada
  • Organizer: 2013 Korea-Japan Molecular Electronics Symposium
  • Place of Presentation: Seoul
  • Year and Date: 2013-07-10
• [Presentation] Sign Change of Photoinduced Magnetoresistance in Organic Field-Effect Transistors (2013)
  • Author(s): S. T. Pham, J. H. Kim, S. Y. Park, and H. Tada
  • Organizer: 2013 Korea-Japan Molecular Electronics Symposium
  • Place of Presentation: Seoul
  • Year and Date: 2013-07-10
• [Presentation] 分子性導体α-(BEDT-TTF)2I3を用いた非局所スピンバルブ測定II-AMR効果とスピン注入の考察- (2013)
  • Author(s): 神谷建, 川椙義高, 荒正人, 夛田博一
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 東広島
  • Year and Date: 2013-03-27
• [Presentation] Spin Injection and Detection in Organic Conductors by the Non-local Spin Valve Measurement (2013)
  • Author(s): Takeshi Kamiya, Yoshitaka Kawasugi, Masato Ara and Hirokazu Tada
  • Organizer: 2013 Korea-Japan Molecular Electronics Symposium
  • Place of Presentation: Seoul, Korea
• [Presentation] Sign Change of Photoinduced Magnetoresistance in Organic Field-Effect Transistors (2013)
  • Author(s): Song Toan Pham, Jong H. Kim, Soo Young Park and Hirokazu Tada
  • Organizer: 2013 Korea-Japan Molecular Electronics Symposium
  • Place of Presentation: Seoul, Korea
• [Presentation] 非局所スピンバルブ測定による分子性導体(BEDT-TTF)2I3塩へのスピン注入検証 (2013)
  • Author(s): 神谷建，川椙義高，荒正人，夛田博一
  • Organizer: 第73回応用物理学会学術講演会
  • Place of Presentation: 京田辺
• [Presentation] 分子性導体α-(BEDT-TTF)2I3を用いた非局所スピンバルブ測定II -AMR効果とスピン注入の考察- (2013)
  • Author(s): 神谷建，川椙義高，荒正人，夛田博一
  • Organizer: 日本物理学会第68回年次大会
  • Place of Presentation: 東広島
• [Presentation] Nonlocal Magnetoresistance in Lateral Spin Valves Based on an Organic Conductor α -(BEDT-TTF) 2I3 (2012)
  • Author(s): T. Kamiya, Y. Kawasugi, M. Ara and H. Tada
  • Organizer: 8th Handai Nanoscience and Nanotechnology International Symposium
  • Place of Presentation: 大阪
  • Year and Date: 2012-12-11
• [Presentation] Annealing effect on the organic magnetoresistance in PCBM based organic diodes (2012)
  • Author(s): M. Fayolle, Y. Kawasugi and H. Tada
  • Organizer: 6th International Meeting on Molecular Electronics
  • Place of Presentation: Grenoble, France
  • Year and Date: 2012-12-04
• [Presentation] Evaluation of spin diffusion length in single crystalline organic conductors (2012)
  • Author(s): H. Tada, T. Kamiya, Y. Kawasugi, and M. Ara
  • Organizer: 6th International Meeting on Molecular Electronics
  • Place of Presentation: Grenoble, France
  • Year and Date: 2012-12-04
• [Presentation] Magnetic Field Effect on Electroluminescence of Organic Light Emitting Field-effect Transistors (2012)
  • Author(s): S. T. Pham, Y. Kawasugi and H. Tada
  • Organizer: MRS Fall Meeting
  • Place of Presentation: Boston, USA
  • Year and Date: 2012-11-29
• [Presentation] Magnetoresistance in Pulsed Laser Deposited Zinc Oxide Films (2012)
  • Author(s): M. Stumpp, T. Ujino, Y. Kawasugi, D. Schlettwein and H. Tada
  • Organizer: MRS Fall Meeting
  • Place of Presentation: Boston, USA
  • Year and Date: 2012-11-26
• [Presentation] Sign Change in Magnetoresistance of Multilayer Pentacene/ Perfluoropentacene Field- Effect Transistors (2012)
  • Author(s): S. T. Pham, Y. Kawasugi and H. Tada
  • Organizer: The 6the International Workshop on Advanced Materials Science and Nanotechnology
  • Place of Presentation: Ha Long City, Vietnam
  • Year and Date: 2012-11-02
• [Presentation] Magnetoresitance in Organic Materials (2012)
  • Author(s): H. Tada
  • Organizer: 2012 International Conference on Solid State Devices and Materials
  • Place of Presentation: Kyoto
  • Year and Date: 2012-09-26
• [Presentation] 分子性導体α-(BEDT-TTF)2I3を用いた非局所スピンバルブ測定 (2012)
  • Author(s): 神谷建, 川椙義高, 荒正人, 夛田博一
  • Organizer: 物理学会2012年秋季大会
  • Place of Presentation: 横浜
  • Year and Date: 2012-09-20
• [Presentation] Epitaxial growth of Co2MnSi films for organic spin-valves (2012)
  • Author(s): T. Ujino, Y. Kawasugi and H. Tada
  • Organizer: 4th International Meeting on Spins in Organic Semiconductors
  • Place of Presentation: London
  • Year and Date: 2012-09-10
• [Presentation] Lateral spin-valves based on molecular conductors (2012)
  • Author(s): Y. Kawasugi, T. Kamiya, M. Ara and H. Tada
  • Organizer: 4th International Meeting on Spins in Organic Semiconductors
  • Place of Presentation: London
  • Year and Date: 2012-09-10
• [Presentation] Magnetoresistance in Organic Materials : From Single Crystals to Single Molecules (2012)
  • Author(s): H. Tada
  • Organizer: International Workshop on Novel Nanomagnetic and Multifunctional Materials 2012
  • Place of Presentation: Seoul
  • Year and Date: 2012-06-11
• [Presentation] 圧力下α-(BEDT-TTF)2I3を用いたスピンバルブの作製 (2012)
  • Author(s): 神谷建
  • Organizer: 日本物理学会第67回年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-24
• [Presentation] Organic Magnetoresistance in Ambipolar Field-effect Transistors Based on Bilayer of Pentacene and Perfluoropentacene (2012)
  • Author(s): Toan S.Pham
  • Organizer: 第59回応用物理学関係連合講演会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2012-03-17
• [Presentation] ホイスラー合金Co2MnSiを電極に用いた有機スピンバルブ素子の作製 (2012)
  • Author(s): 宇治野智大
  • Organizer: 第59回応用物理学関係連合講演会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2012-03-16
• [Presentation] Nonlocal Magnetoresistance in Lateral Spin Valves Based on an Organic Conductor α-(BEDT-TTF)2I3 (2012)
  • Author(s): Takeshi Kamiya, Yoshitaka Kawasugi, Masato Ara, and Hirokazu Tada
  • Organizer: 8th Handai Nanoscience and Nanotechnology International Symposium
  • Place of Presentation: 大阪
• [Presentation] Evaluation of spin diffusion length in single crystalline organic conductors (2012)
  • Author(s): Takeshi Kamiya, Yoshitaka Kawasugi, Masato Ara, and Hirokazu Tada
  • Organizer: 6th International meeting on molecular electronics
  • Place of Presentation: Grenoble, France
• [Presentation] Epitaxial growth of Co2MnSi films for organic spin-valves (2012)
  • Author(s): Tomohiro Ujino, Yoshitaka Kawasugi, and Hirokazu Tada
  • Organizer: 4th International Meeting on Spins in Organic Semiconductors
  • Place of Presentation: London, UK
• [Presentation] Lateral spin-valves based on molecular conductors (2012)
  • Author(s): Yoshitaka Kawasugi, Takeshi Kamiya, Masato Ara, and Hirokazu Tada
  • Organizer: 4th International Meeting on Spins in Organic Semiconductors
  • Place of Presentation: London, UK
• [Presentation] Magnetoresistance in Organic Materials: From Single Crystals to Single Molecules (2012)
  • Author(s): Hirokazu Tada
  • Organizer: International Workshop on Novel Nanomagnetic and Multifunctional Materials 2012
  • Place of Presentation: Seoul, Korea
  • Invited
• [Presentation] Magnetic Field Effect on Photoconductivity of Single-Crystalline Pentacene and Perfluoropentacene Field-Effect Transistors (2011)
  • Author(s): Toan S.Pham
  • Organizer: Materials Research Society Fall Meeting
  • Place of Presentation: ボストン,USA
  • Year and Date: 2011-11-30
• [Presentation] Magnetoresistance in Organic Single-Crystal Field-Effect Transistors (2011)
  • Author(s): Toan S.Pham
  • Organizer: 7th Handai Nanoscience and Nanotechnology International Symposium
  • Place of Presentation: 大阪大学
  • Year and Date: 2011-11-11
• [Presentation] 分子性導体を用いた非局所スピンバルブの研究 (2011)
  • Author(s): 川椙義高
  • Organizer: 日本物理学会2011年秋季大会
  • Place of Presentation: 富山大学
  • Year and Date: 2011-09-22
• [Presentation] 導電性低分子材料を用いた有機スピンバルブの研究 (2011)
  • Author(s): 川椙義高
  • Organizer: 第72回応用物理学会学術講演会
  • Place of Presentation: 山形大学
  • Year and Date: 2011-09-01
• [Presentation] Spin Injection and Transport in Low Molecular Weight Organic Semiconductors (2011)
  • Author(s): Hirokazu Tada
  • Organizer: 219th Electrochemical Society Meeting
  • Place of Presentation: モントリオール, CANADA(招待講演)
  • Year and Date: 2011-05-03
• [Presentation] Spin Interaction and Transport in Organic Semiconductors (2011)
  • Author(s): Hirokazu Tada
  • Organizer: 2011 East Asian Symposium on 2011 East Asian Symposium on Molecular Electronics Materials
  • Place of Presentation: 済州島,KOREA(招待講演)
  • Year and Date: 2011-04-29
• [Remarks]
  • URL: http://www.molectronics.jp
• [Remarks]
  • URL: http://www.molectronics.jp