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}

Journal Article · Thu May 01 00:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.78.3547· OSTI ID:496815

Keren, A; Alloul, H; Mendels, P; Yoshinari, Y ^[1]

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1. Laboratoire de Physique des Solides, URA2 CNRS, Universite Paris Sud, 91405 Orsay (France)

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}

• OSTI ID: 496815
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 18 Vol. 78; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
BARIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
NMR SPECTRA
SPIN ECHO
SPIN FLIP
SPIN-LATTICE RELAXATION
TEMPERATURE DEPENDENCE
YTTRIUM OXIDES