LiVGe2O6, an anomalous quasi 1D, $S = 1$ system, as revealed by NMR

Details LiVGe2O6, an anomalous quasi 1D, $S = 1$ system, as revealed by NMR LiVGe2O6, an anomalous quasi 1D, $S = 1$ system, as revealed by NMR

2000-05-31

arxiv.org/abs/cond-mat/0005534v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 4 Postscript figures. To appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.85.409

We report the results of $^{7}$Li nuclear magnetic resonance (NMR) studies of LiVGe$_{2}$O$_{6}$, a quasi one--dimensional spin $S = 1$ model system, at low temperatures. Our data, including NMR spectra and the temperature dependence of the spin-lattice relaxation rate $T_{1}^{-1}$, indicate a first order phase transition to occur at $T_{c}\simeq 23$ K. The NMR response of LiVGe$_{2}$O$_{6}$ below $T_{c}$ suggests that the ordered phase is antiferromagnetic and has unusual features. Possible reasons for this unexpected behavior are discussed.

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