Electron Paramagnetic Resonance: A Technique to Locate the Nearest Environment of Chromium Luminescent Centers
Grzegorz Leniec
Abstract
High Resolution Image Download MS PowerPoint Slide Electron paramagnetic resonance (EPR) magnetic studies make it possible to determine the nearest environment of luminescent ions if the ions are paramagnetic ones. It is the only research technique that directly determines the nearest environment of a doped (luminescent) ion. This article presents the most important magnetic analyses that should be performed for magnetic studies of luminescent ions. EPR studies make it possible to determine the types of luminescent centers, the point symmetry of these centers, and the distortion of the nearest environment of the luminescent centers. Temperature EPR and static magnetic susceptibility studies make it possible to determine the interactions between magnetic (luminescent) ions, the valence, and the concentration of these ions in the luminescent material. All these elements of magnetic investigations influence the position, shape, and efficiency of the luminescence spectrum.