Electron Spin Resonance Investigations Of Znmns Nanoparticles

Three overlapping spectra are observed in electron spin resonance (ESR) investigations of ZnMnS nanoparticles with Mn fractions between I and 30%. These ESR spectra we relate to Mn ions in volume of nanoparticles, in surface close regions and at the surface. Spin relaxation times T-1 and T-2 are determined from the microwave power dependence of the ESR signals and are compared to those determined in bulk ZnMnS. We do not observe any significant changes of these times in nanoparticles as compared to their values in bulk samples. (c) 2007 Elsevier B.V. All rights reserved.