Singlet-ground-state paramagnetic centers inCuO2layers as seen fromTm169NMR inTmBa2Cu3O6+xsuperconductors
Physical review. B, Condensed matter1995Vol. 51(1), pp. 693–696
Citations Over TimeTop 11% of 1995 papers
Abstract
The $^{169}\mathrm{Tm}$ nuclear spin-lattice relaxation in oxygen-deficient ${\mathrm{TmBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{6+\mathit{x}}$ compounds, as quenched and room-temperature annealed, has been measured at low temperatures. The results are consistent with the existence of paramagnetic centers in the ${\mathrm{CuO}}_{2}$ double layer, which have a nonmagnetic (singlet) ground state separated from an excited magnetic state by an energy gap of the order of 1 K.
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