Fe-doping effects of ferromagnetic Zn0.98−xFe0.02MgxO semiconductor

Abstract The X-ray diffraction patterns of the Zn 0.98– x Fe 0.02 Mg x O ( x =0, 0.05, 0.1, 0.2) powders showed no detectable MgO peaks for x ⩽0.1, whereas clear MgO peaks x =0.2. All the peaks for the X-ray diffraction patterns of x ⩽0.1 samples belong to the hexagonal ( P6 3 mc ) lattice of ZnO. The hysteresis curve at 77 K for the Zn 0.88 Mg 0.1 Fe 0.02 O indicated the coexistence of both a paramagnetic and a ferromagnetic phases. The temperature dependence of magneto-resistance curve shows semiconductor behavior over 220 K.