Magnetic order in Co-doped and (Mn, Co) codoped ZnO thin films by pulsed laser deposition

Abstract

The fabrication on Al2O3 (0001) using pulsed laser deposition was investigated of Co-doped and (Mn, Co) codoped ZnO thin films. The doped ZnO thin films with well wurtzite structures were deposited at a low temperature of 400 °C and low oxygen pressure of 5×10-5 Pa. The three doped ZnO films were found to show room temperature (290 k) ferromagnetism, with saturated magnetic moments. The resistance vs temperature measurements show that the Co-doped ZnO show metallic conductivity with low resistance, while the (Mn, Co) codoped ZnO is semiconductor with high resistance.