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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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Giant magnetoresistance in ferromagnet/organic semiconductor/ferromagnet heterojunctions

Cited 62 times inthomson ciCited 32 times inthomson ci
Title
Giant magnetoresistance in ferromagnet/organic semiconductor/ferromagnet heterojunctions
Author
Yoo, Jung-WooJang, H. W.Prigodin, V. N.Kao, C.Eom, C. B.Epstein, A. J.
Keywords
SPIN INJECTION; TEMPERATURE; TRANSPORT; VALVE; FIELD; METAL
Issue Date
2009-11
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW B, v.80, no.20, pp.1 - 9
Abstract
We report the spin injection and transport in ferromagnet/organic semiconductor/ferromagnet (FM/OSC/FM) heterojunctions using rubrene (C(42)H(28)) as an organic semiconductor spacer. For completeness of our study, both tunneling magnetoresistance (TMR) and giant magnetoresistance (GMR) were studied by varying the thickness of the rubrene layer (5-30 nm). A thorough study of the device characteristics reveals spin-polarized carrier injection into and subsequent transport through the OSC layer. When the thickness of the rubrene layers are beyond the tunneling limit, the device currents are limited by carrier injection and bulk transport. The carrier injection is well described with phonon-assisted field emission. The behavior of GMR in response to bias field and temperature shows significant differences from that of TMR.
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DOI
10.1103/PhysRevB.80.205207
ISSN
2469-9950
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MSE_Journal Papers
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