INHOMOGENEOUS TI-205 NMR LINE BROADENING IN TL2BA2CUOX SINGLE-CRYSTALS

Temperature and angular dependences of Tl-205 line width, DELTA1/2, and transverse relaxation time, tau, have been measured in two crystals of Tl2Ba2CuOx with T(c) = 32 and 115 K, respectively. In the normal state both DELTA1/2 and tau have been found to be temperature-independent and not to vary with varying T(c), implying that the size of inhomogeneous broadening is also invariable. Analysis of the line width angular dependence shows that the inhomogeneous broadening originates, most probably, from local distortions associated with Cu substitution for Tl. A conclusion is that variations in T(c) are not related to this substitution.