Dynamic Spin Fluctuations at $T\to 0$ in a Spin-1/2 Ferromagnetic Kagome Lattice

Abstract

We report magnetization, electron spin resonance (ESR), and muon spin relaxation ($\mu$SR) measurements on single crystals of the $S=1/2$ (Cu) kagomé compound Cu(1,3-benzendicarboxylate). The $\mu$SR is carried to temperatures as low as 45 mK. The spin Hamiltonian parameters are determined from the analysis of the magnetization and ESR data. We find that this compound has anisotropic ferromagnetic interactions. Nevertheless, no spin freezing is observed even at temperatures two orders of magnitude lower than the coupling constants. In light of this finding, the relation between persistent spin dynamics and spin liquid are reexamined.

5 pages, 4 figures

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Cited by in corpus (3)

• Magnetic transitions in the topological magnon insulator Cu(1,3-bdc)
• First-principles study of an organometallic S=1/2 kagome compound
• Quantum Thermal Hall effect of chiral spinons on a Kagome strip