Structural, optical, and magnetic studies of iodine-doped CdO nanopowders and films

Iodine-doped CdO powders of different iodine contents have been synthesized by thermal dissociation of Cd complex. In addition, I-doped CdO thin films have been grown on glass substrates by a physical vapor deposition method. The effects of iodine doping on the structural, magnetic, and optical properties of the host CdO powder and film were systematically studied. The X-ray diffraction study shows that the incorporated I⁻-ions most likely occupy oxygen vacancies (V_O) created naturally in CdO lattice as point defects during synthesis. Thus, I-doping increases the unit-cell volume of host CdO, causes bandgap narrowing, and removing the weak d⁰ ferromagnetic (FM) component of CdO. Therefore, the weak FM component of undoped (d⁰) CdO is defect-induced phenomenon or induced by the created oxygen vacancies (V_O). In the present fundamental investigation, real experimental connection between active V_O, I-doping, and magnetic properties of I-doped CdO was observed and discussed.

Structural, optical and magnetic Study of iodine-doped CdO nanocomposite ceramic

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