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Mass-normalized EPR spectra at room temperature for as-grown (a) and postannealed (b) undoped ZnO and 8 at. % ZnO:Mn. Insets of (a) and (b) show expansion of the sharp line. EPR intensities of the sharp line as a function of temperature for the as-grown (c) and the postannealed (d) ZnO, and ZnO:Mn are also shown. The solid lines are fits by Eq. (1).
Temperature dependence of the (inverse) broad EPR line intensity for the as-grown and postannealed ZnO:Mn. The straight lines are the fits by Curie–Weiss law. Inset: EPR spectra for postannealed ZnO:Mn with a fit to a Lorentzian form.
EPR signals from 5 and 8 at. % ZnO:Mn samples synthesized with 4 g of PVP, and a ZnO:Mn (8 at. %) synthesized with 1 g of PVP.
Mass-normalized NMR spectra of ZnO and ZnO:Mn measured at 300 K. Inset: -axis magnification of the spectra.
Parameters obtained by fitting according to Eq. (1).
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