Muon Spin Relaxation and Susceptibility Studies of Pure and Doped Spin 1/2 Kagomé-like system (Cu$_x$Zn$_{1-x}$)$_{3}$V$_{2}$O$_7$(OH)$_{2}$ 2H$_2$O

A. Fukaya; Y. Fudamoto; I. M. Gat; T. Ito; M. I. Larkin; A. T. Savici; Y. J. Uemura; P. P. Kyriakou; G. M. Luke; M. T. Rovers; K. M. Kojima; A. Keren; M. Hanawa; Z. Hiroi

doi:10.1103/PhysRevLett.91.207603

paper

Muon Spin Relaxation and Susceptibility Studies of Pure and Doped Spin 1/2 Kagomé-like system (Cu $_{x}$ Zn $_{1 - x}$ ) $_{3}$ V $_{2}$ O $_{7}$ (OH) $_{2}$ 2H $_{2}$ O

arXiv:cond-mat/0310739 · doi:10.1103/PhysRevLett.91.207603

Abstract

Muon spin relaxation ( $μ$ SR) and magnetic susceptibility measurements have been performed on the pure and diluted spin 1/2 kagomé system (Cu $_{x}$ Zn $_{1 - x}$ ) $_{3}$ V $_{2}$ O $_{7}$ (OH) $_{2}$ 2H $_{2}$ O. In the pure $x = 1$ system we found a slowing down of Cu spin fluctuations with decreasing temperature towards $T \sim 1$ K, followed by slow and nearly temperature-independent spin fluctuations persisting down to $T$ = 50 mK, indicative of quantum fluctuations. No indication of static spin freezing was detected in either of the pure ( $x$ =1.0) or diluted samples. The observed magnitude of fluctuating fields indicates that the slow spin fluctuations represent an intrinsic property of kagomé network rather than impurity spins.

4 pges, 4 color figures, Phys. Rev. Lett. in press

Muon Spin Relaxation and Susceptibility Studies of Pure and Doped Spin 1/2 Kagomé-like system (Cux​Zn1−x​)3​V2​O7​(OH)2​ 2H2​O

Abstract

Muon Spin Relaxation and Susceptibility Studies of Pure and Doped Spin 1/2 Kagomé-like system (Cu $_{x}$ Zn $_{1 - x}$ ) $_{3}$ V $_{2}$ O $_{7}$ (OH) $_{2}$ 2H $_{2}$ O