Abstract
We have fabricated organic diodes utilizing several -conjugated organic semiconductors (OSEC) as spacer layers between (LSMO) and various metallic electrodes, and measured their magnetoresistance (MR) and magnetoelectroluminescence (MEL) responses. The devices exhibit large negative high-field MR responses that resemble the MR response of the LSMO electrode, but amplified by orders in the resistance, and accompanied by a positive high-field MEL effect. These magnetic-field effects result from enhanced carrier injection at the LSMO-OSEC interface that is attributed to the anomalous field-dependent Fermi level shift in LSMO.
- Received 8 December 2004
DOI:https://doi.org/10.1103/PhysRevLett.95.016802
©2005 American Physical Society