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Interfacial spectroscopic characterization of organic/ferromagnet hetero-junction of 3,4,9,10-perylene-teracarboxylic dianhydride-based organic spin valves

We report interfacial characterization of 3,4,9,10-perylene-teracarboxylic dianhydride (PTCDA)-based organic spin valves (OSV) dusted with a thin layer of partially oxidized alumina at the organic semiconductor (OSC)/ferromagnet (FM) interfaces. Up to 13.5% magnetoresistance is achieved at room temp...

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Bibliographic Details
Published in:Applied physics letters 2014-02, Vol.104 (8), p.83301
Main Authors: Hong, Jhen-Yong, Ou Yang, Kui-Hon, Wang, Bo-Yao, Li, Kai-Shin, Shiu, Hung-Wei, Chen, Chia-Hao, Chan, Yuet-Loy, Wei, Der-Hsin, Chang, Fan-Hsiu, Lin, Hong-Ji, Chiang, Wen-Chung, Lin, Minn-Tsong
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Language:English
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Summary:We report interfacial characterization of 3,4,9,10-perylene-teracarboxylic dianhydride (PTCDA)-based organic spin valves (OSV) dusted with a thin layer of partially oxidized alumina at the organic semiconductor (OSC)/ferromagnet (FM) interfaces. Up to 13.5% magnetoresistance is achieved at room temperature. X-ray photoelectron spectroscopy measurements reveal interfacial electronic interaction between PTCDA and FM while the application of a thin alumina layer at the PTCDA/FM interfaces prevents the electronic hybridization and effectively preserves the spin injection into the OSC spacer. This finding demonstrates the critical effect of interfacial structure on magnetotransport behavior in OSV.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4866164