Nuclear spin-lattice relaxation rate 1/T1 at the planar 0(2,3) and bridging 0(4) oxygen sites in NdBa2CU3O7 have been measured as a function of temperature in fields up to 42T. Data is characterized by extremely fast relaxation due to Nd. A well-defined peak is observed, indicative of spin freezing, occurring well below Tc and higher than TN, and whose physical origin is unknown. Extracted T1 data for Cu(2) shows enhanced Cu-Cu correlations in the superconducting state, suggesting a short-ranged order at lower temperatures.
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Condensed Matter Physics