Interdisziplinäres Zentrum für Materialwissenschaften
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Interdisziplinäres Zentrum für Materialwissenschaften
Nanotechnikum Weinberg
Heinrich-Damerow-Str. 4,
D-06120 Halle, Germany
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M. Grünewald, J. Kleinlein, F. Syrowatka, F. Würthner, L. W. Molenkamp, G. Schmidt
Large room-temperature magnetoresistance in lateral organic spin valves fabricated by in situ shadow evaporation.
Org. Electron. 14 (2013), 2083-2086

We report the successful fabrication of lateral organic spin valves with a channel length in the sub 100 nm regime. The fabrication process is based on in situ shadow evaporation under UHV conditions and therefore yields clean and oxygen-free interfaces between the ferromagnetic metallic electrodes and the organic semiconductor. The spin valve devices consist of Nickel and Cobalt-Iron electrodes and the high mobility n-type organic semiconductor N,N'-bis(heptafluorobutyl)-3,4:9,10-perylene diimide. Our studies comprise fundamental investigations of the process' and materials' suitability for the fabrication of lateral spin valve devices as well as magnetotransport measurements at room temperature. The best devices exhibit a magnetoresistance of up to 50 %, the largest value for room temperature reported so far.

Keywords: metal; polymers; preparation; spintronics

DOI 10.1016/j.orgel.2013.04.049
© Elsevier 2013

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