Korneva I, Ostafin M, Sinyavsky N, Nogaj B, Maćkowiak M
Baltic State Academy, Molodiozhnaya str. 6, 236029 Kaliningrad, Russia.
Solid State Nucl Magn Reson. 2007 May;31(3):119-23. doi: 10.1016/j.ssnmr.2007.03.001. Epub 2007 Apr 1.
The method of two-dimensional nutation nuclear quadrupole resonance in time domain is used to study the chalcogenide semiconductor As(2)Se(3). In this system, the nuclear quadrupole resonance (NQR) resonance line width is as large as 10 MHz; therefore, the radiofrequency field produced by a pulsed NQR spectrometer can excite only a portion of the nuclear spins. The proposed method relies on polarizing the melted glass specimen in a strong magnetic field so that orientational disorder is partially removed. After hardening the sample is placed in a spectrometer r.f. coil in such a way that that the axes of sample polarization and r.f. coil coincide. We demonstrate the application of this method to determine eta in glassy As(2)Se(3).
采用时域二维章动核四极共振方法研究硫族化合物半导体As(2)Se(3)。在该体系中，核四极共振（NQR）共振线宽高达10 MHz；因此，脉冲NQR光谱仪产生的射频场只能激发一部分核自旋。所提出的方法依赖于在强磁场中极化熔融玻璃样品，以便部分消除取向无序。样品硬化后，将其放置在光谱仪的射频线圈中，使样品极化轴与射频线圈轴重合。我们展示了该方法在确定玻璃态As(2)Se(3)中的η方面的应用。
