NMR Study of ${}^{17}O$ Transverse Relaxation in ${YBa}_{2} {Cu}_{3} (^{16} O_{1 - c}^{17} O_{c})_{7}$

5 May 1997

journal article
Published by American Physical Society (APS) in Physical Review Letters

Vol. 78 (18) , 3547-3550
https://doi.org/10.1103/physrevlett.78.3547

Abstract

NMR transverse relaxation (TR) measurements of 17O in the O(2,3) sites of YBa2Cu3(16O1−c17Oc)7 are presented. A Gaussian-like relaxation is found. The origin of this relaxation is investigated by varying the isotopic concen- tration of the oxygen, the temperature, the external field, and by comparing it with the O(4) site. Our results are consistent with a model in which this relaxation is caused by the dynamical fluctuation of copper nuclei, including both spin lattice and flip-flop processes. With this model we can explain consistently the TR of 89Y and 63,65Cu(1) as well. We use our results to re-analyze previous NMR 63,65Cu(2) TR data.

Keywords

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NMR Study ofO17Transverse Relaxation inYBa2Cu3(16O1−c17Oc)7

Abstract

Keywords

NMR Study of ${}^{17}O$ Transverse Relaxation in ${YBa}_{2} {Cu}_{3} (^{16} O_{1 - c}^{17} O_{c})_{7}$