Abstract
We report muon spin resonance experiments on MgCu(OH)Cl with , a material isostructural to Herbertsmithite exhibiting regular kagome planes of ions (Cu), and therefore a candidate for a spin-liquid ground state. We evidence the absence of any magnetic ordering down to 20 mK (). We present a detailed investigation of the spin dynamics on well-characterized samples in zero and applied longitudinal fields, and a defect-based interpretation is proposed to explain the unconventional dynamics observed in the quantum spin-liquid phase.
- Received 20 July 2011
DOI:https://doi.org/10.1103/PhysRevB.84.100401
©2011 American Physical Society