Anomalies on temperature dependence of nuclear relaxation of 63Cu nuclei in YBa2Cu3O7-x
Bondar' A. V. , Ryabchenko S. M. , Fedotov Yu. V., Motuz A. A.
Structural features have been found on the temperature dependence of the spin-spin and spin-lattice relaxation times of 63Cu nuclei in YBa2Cu307 _ x at 35 K. These results, combined with previous results, suggest either a second-order phase transition or a restructuring of the dynamic state of intrinsic defects in YBa2Cu307_x at35K.