63,65Cu NMR spectra and relaxation measurements in RuSr 2GdCu2O8, in the temperature range 5-300 K, are reported. From the second-order quadrupole broadening of the NMR line the quadrupole coupling constant turns out vQ≃28.5 MHz. NMR line broadening, possibly related to Ru spins ordering, is observed on cooling. The spin-lattice relaxation rates 2W, involving the in-plane magnetic correlation length, do not show critical behavior above the ordering temperature. On approaching the superconducting transition 2W displays a temperature dependence similar to the one in underdoped YBCO.
Cu NMR spectra and relaxation in rutheno-cuprate RuSr2GdCu2O8 / P. Tedesco, A. Lascialfari, A. Rigamonti, I. Zucca, A. Vecchione, M. Gombos, S. Pace, M. Ferretti, M.R. Cimberle. - In: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS. - ISSN 0304-8853. - 272-276:suppl. 1(2004), pp. E147-E148. [10.1016/j.jmmm.2003.11.088]
Cu NMR spectra and relaxation in rutheno-cuprate RuSr2GdCu2O8
A. LascialfariSecondo
;
2004
Abstract
63,65Cu NMR spectra and relaxation measurements in RuSr 2GdCu2O8, in the temperature range 5-300 K, are reported. From the second-order quadrupole broadening of the NMR line the quadrupole coupling constant turns out vQ≃28.5 MHz. NMR line broadening, possibly related to Ru spins ordering, is observed on cooling. The spin-lattice relaxation rates 2W, involving the in-plane magnetic correlation length, do not show critical behavior above the ordering temperature. On approaching the superconducting transition 2W displays a temperature dependence similar to the one in underdoped YBCO.
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