Nuclear Quadrupole Relaxation in Ge–As–Se Chalcogenide Glasses

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概要

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• 75As nuclear quadrupole resonance (NQR) spin–spin ($T_{2}$) and spin–lattice ($T_{1}$) relaxation time measurements have been performed in glasses of the Ge–As–Se system as a function of average coordination number $\bar{r}$. The results for $T_{2}$ indicate that in compositions with high $\bar{r}$ the inhomogeneities in the local structure increase and clustering effects lead to nanoscale phase separation. There is evidence of the indirect interaction of As atoms ($J$-coupling) in these compositions. The spin–lattice relaxation occurs through "spin diffusion" when inhomogeneities in the spin system environment lead to the distribution of relaxation rates. We suggest that $T_{1}$ measurements can provide a probe of the network rigidity in some glasses.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2008-10-25

著者

• Taylor P.

  Physics Department, Colorado School of Mines, 1523 Illinois Street, Golden, CO 80401, U.S.A.

• Mammadov Eldar

  Physics Department, Colorado School of Mines, 1523 Illinois Street, Golden, CO 80401, U.S.A.

関連論文

• Nuclear Quadrupole Relaxation in Ge–As–Se Chalcogenide Glasses

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