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Study of the EFG tensor at 75As nuclei in Ge‐As‐Se chalcogenide glasses |
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| Authors: | O. N. Bolebrukh N. Ya. Sinyavsky B. Dobosz I. P. Korneva R. Krzyminiewski M. Ostafin B. Nogaj |
| Affiliation: | 1. Laboratory of Magnetic Resonance, Institute of Physics and Technology, Immanuel Kant Baltic Federal University, , 236041 Kaliningrad, Russia;2. Division of Physics, Department of Radio Engineering, Baltic State Academy of Fishing Fleet, , 236029 Kaliningrad, Russia;3. Division of Medical Physics, Department of Physics, Adam Mickiewicz University in Poznan, , 61‐614 Poznan, Poland |
| Abstract: | Asymmetry parameters of the electric field gradient tensor at 75As nuclei were determined for chalcogenide glassy semiconductors (CGS) of the Ge‐As‐Se system by comparing the experimental and simulated 75As 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  = 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  = 2.4 from two‐dimensional to three‐dimensional CGS structure. Copyright © 2013 John Wiley & Sons, Ltd. |
| Keywords: | glassy semiconductors nuclear quadrupole resonance spectroscopy geometric phase (Berry phase) asymmetry parameter electron paramagnetic resonance spectroscopy (EPR) |