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Abstract

Application of ¹⁹⁹Hg solid-state NMR to Hg based HTSC

It is proposed to study Hg-oxide ceramics, which are high-temperature superconductors, with ¹⁹⁹Hg NMR spectroscopy. As an exemplary application of this method first room-temperature ¹⁹⁹Hg spectra and spin-lattice relaxation times of samples with different macrostructures are presented. A spin-lattice relaxation time of T₁ = 35 ms is found. All samples exhibit similar characteristic powder spectra caused by an axially symmetric ¹⁹⁹Hg spin interaction. The isotropic value and the anisotropy of the tensor relative to solid HgCl₂ as a standard substance is estimated.