Abstract
We have performed muon spin relaxation measurements of the frustrated kagomé lattice spin system Sr. Our results demonstrate the slowing down of the Cr spin fluctuations when cooling toward the susceptibility-cusp temperature K. The saturation of the relaxation rate below , together with its weak dependence on longitudinal field (LF) between 0 and 2 kG, indicates the presence of dynamic spin fluctuations persisting even at mK without static order parameter. We propose a spin-liquid type ground state to explain an undecouplable Gaussian shape of the relaxation function observed at .
- Received 16 May 1994
DOI:https://doi.org/10.1103/PhysRevLett.73.3306
©1994 American Physical Society