Laboratory of Magnetic Resonance, Institute of Physics and Technology, Immanuel Kant Baltic Federal University, A. Nevski 14, 236041, Kaliningrad, Russia.
Magn Reson Chem. 2013 Oct;51(10):614-20. doi: 10.1002/mrc.3990. Epub 2013 Aug 8.
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.
通过比较实验和模拟的（75）As 核四极共振章动干涉图，确定了 Ge-As-Se 系统的硫属玻璃半导体（CGS）中（75）As 核电场梯度张量的不对称参数。分析了 CGS 中的电场梯度不对称性，认为在 r¯ = 2.425 处这些玻璃半导体发生了结构变化。首次获得了 Ge-As-Se 系统的电子顺磁共振谱。通过核四极共振和电子顺磁共振方法对 Ge-As-Se 系统的分析结果进行了比较，这使我们假设在 r¯ = 2.4 处从二维到三维 CGS 结构发生了结构相变。
