Nuclear spin-lattice relaxation in the metal-oxide system NaxWO3
Vavilova E. L , Garifullin I. A. , Garif'yanov N. N., Maramzin V. Yu. , Teitel'baum G. B. , Khaliullin G. G.
A qualitative difference has been found between the temperature dependence of the rate of spin relaxation of sodium nuclei in a NaxW03 sample with a superconducting composition (x = 0.2) and that in a sample with a nonsuperconducting composition (x = 0.4). The difference is attributed to antiferromagnetic correlations in the conduction band of the sample with a superconducting composition.