| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1593636 | Solid State Communications | 2011 | 4 Pages |
Large room-temperature (RT) magnetoresistance (MR) and temperature-dependent MR inversion have been observed in tris (8-hydroxyquinoline) aluminum (Alq3)-cobalt nanocomposites-based organic–inorganic hybrid devices. Negative MR–high resistance for parallel electrodes configuration — due to magnetization reversal of ferromagnetic (FM) electrodes has been observed at low temperatures. As the temperature increases, the MR undergoes a sign change. At room temperature, a positive MR of ∼9.7% with the resistivity dropping monotonously with increasing magnetic fields has been observed. The RT MR is about two orders of magnitude of that in organic-FM nanocomposites measured with nonmagnetic electrodes. The enhancement of RT MR is attributed to the injection of spin polarized carriers into Alq3-Co nanocomposites.
► Tris 8-hydroxyquinoline aluminum (Alq3)-cobalt nanocomposites as transport layer. ► Negative magnetoresistance (MR) is observed at low temperature. ► Large positive MR of about 9.7% is observed at room temperature. ► The MR undergoes a sign change with the increasing temperature.
