Collect. Czech. Chem. Commun. 1997, 62, 1721-1729

Computer Simulation of Electron Spin Resonance Spectra of Ge25S75and Ge30S70 Bulk Glasses

Zdeněk Černošeka, Marek Liškab, Peter Pelikánc, Eva Černoškovád, Marián Valkoc and Miloslav Frumara

a Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, 532 10 Pardubice, Czech Republic
b Institute of Inorganic Chemistry, Slovak Academy of Sciences, 911 01 Trenčín, Slovak Republic
c Department of Physical Chemistry, Faculty of Chemical Technology, Slovak Technical University, 812 37 Bratislava, Slovak Republic
d Joint Laboratory of Solid State Chemistry of the Academy of Sciences of the Czech Republic and University of Pardubice, 530 09 Pardubice, Czech Republic


The electron spin resonance (ESR) spectra of bulk glasses of the chemical composition Ge25S75 and Ge30S70 were measured at liquid nitrogen temperature and subjected to computerized separation. The complex ESR spectra of both glasses were found to represent a superposition of three paramagnetic defect spectra, two with orthorhombic tensors g and one with the axial tensor g. The former two paramagnetic centers can be related to a two-atomic defect of the sulfur-sulfur type, the latter to a germanium-sulfur defect. The experimental results are in a good agreement with the non-dangling bond model of paramagnetic defects in Ge-S glasses.

Keywords: Electron spin resonance; ESR; EPR spectroscopy; Computer simulation; Paramagnetic defects; Ge-S glasses.