Magnetic Properties of C-Implanted and P-Implanted MgO Single Crystal: A Comparative Experimental and First-Principle Study

The magnetic properties were investigated for C- and P-implanted MgO single crystals, which irradiated by 80 keV C P ions with the dose of 3 × 1017 ions/cm2. pristine apparently changed ion implantation. Room temperature ferromagnetism was presented in C-implanted sample, while sample only displayed paramagnetism at 20 K. For purpose clarifying correlation between microstructure, a comparative study carried out using experimental theoretical methods both ion-implanted samples. defect types characterized X-ray diffraction, photoelectron spectroscopy, photoluminescence, absorption spectrum. existence intrinsic (Mg vacancies, O vacancies) extrinsic (C-related P-related) defects verified results. induced various composite studied first-principle calculations. calculation results indicated that configuration VMg vacancy) + CO (C substitute defect) key factor inducing ferromagnetic MgO. case MgO, P-related vacancies can contribute to total moment value but cannot induce ferromagnetism.