199Hg and63,65Cu NMR studies of mercury based high-Tc superconductors

W. Hoffmann, H. Breitzke, C. T. Simmons, K. Lüders, G. Buntkowsky, H. H. Limbach, E. V. Antipov, A. A. Gippius, O. Loebich, H. R. Khan, M. Paranthaman, J. R. Thompson

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2 Citations (Scopus)

Abstract

Hg-oxide ceramic high temperature superconductors were studied by199Hg and63,65Cu NMR spectroscopy. Room temperature spectra, spin-spin and spin-lattice relaxation times of samples with different superconducting transition temperatures are presented. A spin-lattice relaxation time of T1=35 msec and a spin-spin relaxation time of T2=1.6 msec were found for the199Hg NMR. All samples exhibit similar characteristic powder spectra caused by an axially symmetric199Hg spin interaction. The isotropic value and the anisotropy of the tensor relative to solid HgCl2 as a standard substance is estimated. Furthermore, results of63,65Cu NMR measurements at a temperature of 4.2 K which exhibit a typical powder line shape (for I=3/2) are presented.

Original languageEnglish
Pages (from-to)57-65
Number of pages9
JournalApplied Magnetic Resonance
Volume8
Issue number1
DOIs
Publication statusPublished - Jan 1995
Externally publishedYes

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