Abstract
AbstractThe electrical conductivity of zinc ferrite (ZFO) thin films can be tuned over 7 orders of magnitude. The conductivity is thermally induced with two activation energies around 40–55 meV and 70–130 meV. Doping of the ZFO films with 1 at% Si or Ge further increases the conductivity. The magnetic hysteresis shows coercive fields of about 0.01 T and high saturation magnetization up to 300 emu/cm3 at 300 K. The electronic Hall mobility and carrier concentration at high magnetic fields are about 0.07 cm2/V s and 1.2 × 1020 cm–3 at room temperature, respectively, which indicates a hopping dominated conductivity. The out‐of‐plane orientation of the ZFO films fabricated by pulsed laser deposition is (001) on SrTiO3(001) and (111) on SrTiO3(111).magnified imageThe resistivity of ZnFe2O4 thin films on SrTiO3 is tunable over 7 orders of magnitude by the PLD growth parameters and doping with group IV elements.(© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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