Magnetotransport properties of Zn90Mn7.5Cu2.5O100 films
in: Thin Solid Films (2008)
Zn90Mn7.5Cu2.5O100 films have been prepared on a-plane sapphire substrates by pulsed laser deposition. Paramagnetism mainly caused by Mn2+ ions was observed in the films from room temperature down to 2 K. Magnetotransport properties (magnetoresistance (MR) and Hall effect) were studied from 5 K to 290 K up to a field of 6 T. NegativeMR was observed at temperature above 100 K. Low field positiveMR and high field negative MR was observed at 5 K. Clear anomalous Hall effect with a kink at low field was observed below 20 K, indicating that there exist two different scattering mechanisms for the Mn2+ and Cu2+ ions.