2013 Fiscal Year Final Research Report
Verification of long-distance spin transport in spin liquid state using local excitation and detection of electron spin resonance
| Project/Area Number |
24654100
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Condensed matter physics II
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KIMATA Motoi 東京大学, 物性研究所, 助教 (20462517)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | 電子スピン共鳴 / スピン流 / 有機薄膜デバイス |
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| Research Abstract |
We have verified that the local excitation of the spin states can be a spin current injector for high-resistivity materials, e.g., organic materials. We have also investigated the spin transport length of organic materials. As the first step, we have fabricated ferromagnet/organic junction using permalloy (Py) ferromagnet and PEDOT:PSS organic polymer, and then, performed spin pumping experiment. In this experiment, the spin states of organic layer is locally excited via exchange interaction at the Py/PEDOT:PSS interface. The transmitted spin current is detected by the inverse spin Hall effect of the Platinum (Pt) layer located at the opposite of the PEDOT:PSS film. The obtained spin diffusion length of PEDOT:PSS film is approximately 140 nm.
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