MBE grown preferentially oriented CdMgO alloy on m- and c-plane sapphire substrates

Unlike other II-VI semiconductors, CdO-based transparent oxide has great potential application for the fabrication of many optoelectronic devices. In this work, we study growth CdxMg1-xO alloys on m- and c-plane sapphire substrates in Cd-rich to Mg-rich conditions using plasma-assisted molecular beam epitaxy method. A structural morphological CdMgO random was carried out X-ray diffraction Atomic Force Microscope (AFM) techniques whereas composition analysis done by Energy-dispersive (EDX) spectroscopy The optical properties thin films were investigated UV-Vis at room temperature. confirmed presence cubic rock salt structure with <111> crystallographic orientation <110> preferential m-plane sapphire. surface roughness measured AFM. From absorption curve, bandgaps determined Tauc relation it found that bandgap is influenced incorporation Mg2+ ions into CdO lattice. Bowing parameter calculated both samples c- sapphires.