Muon-spin-relaxation (μ SR) measurements were carried out on the randomness-introduced quantum spin system Tl1 - x Kx CuCl3. Zero-field μ SR measurement results reveal that the rapid increase of the μ SR rate λ with decreasing temperature in the case of x = 0.58. From the result of longitudinal-field μ SR measurements, a finite relaxation remains at 4000 G, which means that Cu - 3 d spins fluctuate down to 20 mK although the slowing down of the frequency of the spin fluctuation occurs. These results suggest that there is a quite possibility of the existence of an ordered or spin frozen phase in a neighboring concentration of x around 0.58.
- μ SR
- Quantum spin system
- Tl K CuCl
ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering