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Title: NMR Study of {sup 17}O Transverse Relaxation in YBa{sub 2}Cu{sub 3}({sup 16}O{sub 1-c}{sup 17}O{sub c}){sub 7}

Abstract

NMR transverse relaxation (TR) measurements of {sup 17}O(2,3) in YBa{sub 2}Cu{sub 3}({sup 16}O{sub 1-c}{sup 17}O{sub c}){sub 7} are presented. A Gaussian-like relaxation is found. The origin of this relaxation is investigated by varying c, the temperature, the external field, and by comparing it with the {sup 17}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 also explain the TR of {sup 89}Y and {sup 63}Cu( 1). We use our results to reanalyze previous NMR {sup 63}Cu( 2) TR data and find the dynamical exponent z=1. {copyright} {ital 1997} {ital The American Physical Society}

Authors:
; ; ;  [1]
  1. Laboratoire de Physique des Solides, URA2 CNRS, Universite Paris Sud, 91405 Orsay (France)
Publication Date:
OSTI Identifier:
496815
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 78; Journal Issue: 18; Other Information: PBD: May 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 66 PHYSICS; YTTRIUM OXIDES; NMR SPECTRA; BARIUM OXIDES; COPPER OXIDES; HIGH-TC SUPERCONDUCTORS; SPIN-LATTICE RELAXATION; SPIN FLIP; SPIN ECHO; TEMPERATURE DEPENDENCE

Citation Formats

Keren, A, Alloul, H, Mendels, P, and Yoshinari, Y. NMR Study of {sup 17}O Transverse Relaxation in YBa{sub 2}Cu{sub 3}({sup 16}O{sub 1-c}{sup 17}O{sub c}){sub 7}. United States: N. p., 1997. Web. doi:10.1103/PhysRevLett.78.3547.
Keren, A, Alloul, H, Mendels, P, & Yoshinari, Y. NMR Study of {sup 17}O Transverse Relaxation in YBa{sub 2}Cu{sub 3}({sup 16}O{sub 1-c}{sup 17}O{sub c}){sub 7}. United States. doi:10.1103/PhysRevLett.78.3547.
Keren, A, Alloul, H, Mendels, P, and Yoshinari, Y. Thu . "NMR Study of {sup 17}O Transverse Relaxation in YBa{sub 2}Cu{sub 3}({sup 16}O{sub 1-c}{sup 17}O{sub c}){sub 7}". United States. doi:10.1103/PhysRevLett.78.3547.
@article{osti_496815,
title = {NMR Study of {sup 17}O Transverse Relaxation in YBa{sub 2}Cu{sub 3}({sup 16}O{sub 1-c}{sup 17}O{sub c}){sub 7}},
author = {Keren, A and Alloul, H and Mendels, P and Yoshinari, Y},
abstractNote = {NMR transverse relaxation (TR) measurements of {sup 17}O(2,3) in YBa{sub 2}Cu{sub 3}({sup 16}O{sub 1-c}{sup 17}O{sub c}){sub 7} are presented. A Gaussian-like relaxation is found. The origin of this relaxation is investigated by varying c, the temperature, the external field, and by comparing it with the {sup 17}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 also explain the TR of {sup 89}Y and {sup 63}Cu( 1). We use our results to reanalyze previous NMR {sup 63}Cu( 2) TR data and find the dynamical exponent z=1. {copyright} {ital 1997} {ital The American Physical Society}},
doi = {10.1103/PhysRevLett.78.3547},
journal = {Physical Review Letters},
number = 18,
volume = 78,
place = {United States},
year = {1997},
month = {5}
}