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arXiv · 1311.7411

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

Oren Ofer·Lital Marcipar·V. Ravi Chandra·Snir Gazit·Daniel Podolsky·Daniel P. Arovas·Amit Keren
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Abstract

We report magnetization, electron spin resonance (ESR), and muon spin relaxation ($\mu $SR) measurements on single crystals of the $S=1/2$ (Cu$% ^{+2}$) kagom\'{e} 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.

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Oren Ofer, Lital Marcipar, V. Ravi Chandra, Snir Gazit, Daniel Podolsky, Daniel P. Arovas, Amit Keren. 2013-11-28. Dynamic Spin Fluctuations at $T\rightarrow 0$ in a Spin-1/2 Ferromagnetic Kagome Lattice. https://doi.org/10.1103/physrevb.89.205116

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