%0 Journal Article
%T Study of the EFG tensor at 75As nuclei in Ge-As-Se chalcogenide glasses.
%A Bolebrukh ON
%A Sinyavsky NY
%A Dobosz B
%A Korneva IP
%A Krzyminiewski R
%A Ostafin M
%A Nogaj B
%J Magn Reson Chem
%V 51
%N 10
%D Oct 2013
%M 23925857
%F 2.392
%R 10.1002/mrc.3990
%X Asymmetry parameters of the electric field gradient tensor at (75) As nuclei were determined for chalcogenide glassy semiconductors (CGS) of the Ge-As-Se system by comparing the experimental and simulated (75) As nuclear quadrupole resonance nutation interferograms. The electric field gradient asymmetry in CGS was analyzed, and it is believed that a structural change in these glassy semiconductors takes place at r¯ =  2.425. Electron paramagnetic resonance spectra of the Ge-As-Se system were obtained for the first time. A comparison was made between the results of analysis of the Ge-As-Se system by nuclear quadrupole resonance and electron paramagnetic resonance methods, and this allowed us to make the supposition that a structural phase transition occurs at r¯ = 2.4 from two-dimensional to three-dimensional CGS structure.