A magnetic double-resonance investigation of the quadrupole interaction in ZnO single crystals

ESR studies of hydrogen-induced paramagnetic defects in polycrystalline ZnO films

“…The linewidth of ESR signal at 77 K, DH pp , was found to be 0.63 ± 0.05 mT for as-grown poly-ZnO and 0.95 ± 0.05 mT for hydrogen treated polyZnO:H sample. The ESR lines exhibited a Lorentzian line shape that was attributed to either delocalized electrons in the conduction band or to a shallow impurity band of semiconductors [18]. As the temperature was increased from 77 to 300 K the ESR signal for both untreated and hydrogen treated poly-ZnO samples became less intense.…”