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- W2319317504 abstract "The authors report on ${}^{63}mathrm{Cu}$ Zeeman-perturbed nuclear quadrupole resonance (NQR) spin-lattice relaxation measurements in ${mathrm{Sr}}_{14}{mathrm{Cu}}_{24}{mathrm{O}}_{41}$. The measurements were performed for field intensities varying from 40 G up to 9.4 T, allowing a careful study of the low-frequency excitations in the $S=1/2$ two-leg-ladder and chains present in this compound. The relaxation of ${}^{63}mathrm{Cu}(2)$ nuclei in the ladder is dominated at low temperatures by a very-low-frequency dynamic, possibly related to the slowing down of the spin fluctuations around a localized hole. At high temperatures, where this contribution is negligible, one observes ${1/T}_{1}$ diverging logarithmically with decreasing field intensity. These observations are discussed within the framework of recent theoretical models and a comparison with the corresponding results for the chain ${}^{63}mathrm{Cu}(1)$ nuclei is presented." @default.
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- W2319317504 date "1998-03-01" @default.
- W2319317504 modified "2023-09-27" @default.
- W2319317504 title "Low-frequency excitations inSr14Cu24O41from63CuZeeman perturbed NQR" @default.
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- W2319317504 doi "https://doi.org/10.1103/physrevb.57.r5606" @default.
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