The NMR spin-lattice relaxation rate, (formula presented) can be measured precisely by progressive saturation. This efficient technique is useful when (formula presented) is long and the NMR signal is weak. We derive the quasiequilibrium spin response to excitation in the case of a Zeeman spectrum in the presence of quadrupolar interactions. Exact solutions for the recovery of magnetization under the influence of purely magnetic fluctuations for (formula presented) (formula presented) and (formula presented) are presented. This is the general solution to a problem that has been previously solved only for the (formula presented) case. An important example for the application of this technique is (formula presented) NMR in cuprate superconductors (formula presented) We show comparisons of the theory with the relaxation measured for high-temperature superconducting materials and the NMR-rates measured by this technique across the vortex-broadened spectrum at low temperature.
|Original language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - Jan 1 2001|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics