Abstract
Spatially resolved NMR is used to probe the magnetism in the vortex state of Tl2Ba2CuO6+δ (Tc=85 K). We found that (1): T1−1 at 205Tl is extremely enhanced toward to the vortex core, (2): T1 process becomes largely inhomogeneous nearby the vortex core, and (3): the T-dependence of T1−1 at the vortex core region shows a peak at T=20 K. These results indicate a clear evidence of the local AF order inside the vortex core. The suppression of the d-wave superconducting order parameter leads to the nucleation of islands with the local AF order.
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