Abstract
Here we report the effect of Zn doping in NiO, in thin film form. Thin film with the composition Ni0.98 Zn 0.02O has been prepared on [001] oriented Al2O3 substrate using pulsed laser deposition technique. X-ray diffraction, SEM, and magnetic measurements were performed to investigate the properties of this material. XRD study revealed oriented growth of the film along the [111] direction. To characterize the magnetic behavior of the film, magnetization vs temperature (M-T) and magnetization vs field (M-H) measurements were performed. Anomalous behavior in M-T measurement has been observed in the low temperature region. At the temperature ~ 70 K, Zn doped NiO thin film is showing antiferro to ferro type of transition. This is in contrast to the pure NiO, which remains antiferromagnetic at low temperatures. Observation of isothermal magnetization hysteresis behavior with finite moment confirms ferromagnetism in Zn doped NiO at low temperatures.
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