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Yoo, Jung-Woo
Functional Hybrid Materials and Devices Lab(FHMDL)
Research Interests
  • Transport properties, spintronics, organic/molucular magnet, electronic, and spintronics,
  • 2DEG, energy harvesting device, atomic/molecular layer deposition

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Spin injection/detection using an organic-based magnetic semiconductor

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Title
Spin injection/detection using an organic-based magnetic semiconductor
Author
Yoo, Jung-WooChen, Chia-YiJang, H. W.Bark, C. W.Prigodin, V. N.Eom, C. B.Epstein, A. J.
Keywords
Carbon-based; Chemical tuning; Device resistance; Electron spins; Electronic and magnetic properties; External magnetic field; Ferromagnetic oxides; Information storage; Magnetic layers; Magnetic tunnel junction; Nonmagnetics; Organic semiconductor; Room temperature; Spin alignment; Spin valve; Spintronics; Spintronics device; Tetracyanoethylene
Issue Date
2010-08
Publisher
NATURE PUBLISHING GROUP
Citation
NATURE MATERIALS, v.9, no.8, pp.638 - 642
Abstract
The new paradigm of electronics, 'spintronics', promises to extend the functionality of information storage and processing in conventional electronics(1). The principal spintronics device, the 'spin valve', consists of two magnetic layers decoupled by a spin-transporting spacer, which allows parallel (on) and antiparallel (off) alignment of the magnetizations (spins) of the two magnetic layers. The device resistance then depends on the spin alignment controlled by the external magnetic field. In pursuit of semiconductor spintronics(2), there have been intensive efforts devoted to develop room-temperature magnetic semiconductors(3) and also to incorporate both inorganic semiconductors(4) and carbon-based materials(5-11) as the spin-transporting channels. Molecule/organic-based magnets, which allow chemical tuning of electronic and magnetic properties, are a promising new class of magnetic materials for future spintronic applications(12,13). Here, we report the realization of an organic-based magnet as an electron spin polarizer in the standard spintronics device geometry. A thin non-magnetic organic semiconductor layer and an epitaxial ferromagnetic oxide film were employed to form a hybrid magnetic tunnel junction. The results demonstrate the spin-polarizing nature of the organic-based magnetic semiconductor, vanadium(TCNE: tetracyanoethylene)(x) (x similar to 2; T(c) similar to 400 K), and its function as a spin injector/detector in hybrid magnetic multilayer devices.
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DOI
10.1038/NMAT2797
ISSN
1476-1122
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MSE_Journal Papers
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