American Physical Society, Physical review B, 24(80)
DOI: 10.1103/physrevb.80.241201
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Measurements of the effect of a magnetic field on the light output and current through an organic light emitting diode made with deuterated aluminium tris(8-hydroxyquinoline) have shown that hyperfine coupling with protons is not the cause of the intrinsic organic magnetoresistance. We suggest that interactions with unpaired electrons in the device may be responsible. ; Comment: Submitted