The analysis of the EPR spectra in ZnO: Mn nanocrystals using the derivative spectroscopy method

  • O. V. Kovalenko Oles Honchar Dnipro National University, Dnipro, Ukraine
  • Ye. G. Plakhtii Oles Honchar Dnipro National University, Dnipro, Ukraine
  • O. V. Khmelenko Oles Honchar Dnipro National University, Dnipro, Ukraine
  • V. Yu. Vorovsky Oles Honchar Dnipro National University, Dnipro, Ukraine
Keywords: EPR, ZnO: Mn nanocrystals, derivative spectroscopy method, hyperfine structure of the EPR spectrum, EPR spectrum constants

Abstract

A method for computer processing of experimental EPR spectra using the derivative spectroscopy method is proposed. Application of the proposed method to a wide, structureless line of the EPR spectrum in ZnO: Mn nanocrystals obtained by the cryochemical method made it possible to isolate the components of the spectrum, associate them with Mn2+ ions. Application of the proposed method to the analysis of the EPR spectrum ZnO: Mn nanocrystal's obtained by ultrasonic pyrolysis of an aerosol with a different activator concentration after annealing made it possible to reveal the presence of an hyperfine structure of the EPR spectrum of Mn2+ ions, which are located in different local environments. The  constants of the detected spectra are determined.

Published
2019-12-27
Section
Articles