T.B. Doyle

A Search for Magnetic Effects in Ion Implanted ZnO and SiC

Mossbauer spectroscopy studies and magnetization measurements have been performed on ZnO and 3C‐SiC samples implanted with 57Fe ions with fluences of 0.5–2.0×1016 ions/cm‐2. For single energy implantations and annealing up to 1173 K, the Mossbauer spectra show the Fe3+ ions to remain fairly constant in the crystals, with little evidence of magnetic clustering at implantation fluencies below 2 at. % However, MOKE measurements on ZnO single crystals implanted with 1, 2 and 4 at. %56Fe in a box profile show ferromagnetic behaviour in the 4% implanted sample and weak paramagnetic or ferromagnetic behaviour at room temperature for the other samples. In a SiC sample implanted with 1×1016/cm2 57Fe and annealed at 973 K, magnetization measurements indicate a weak ferromagnetic effect.