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Observation of Spin Freezing in CaV4O9 and CaV2O5 by uSR

G. M. Luke·Y. Fudamoto·K. M. Kojima·M. Larkin·J. Merrin·B. Nachumi·S. Sinawi·Y. J. Uemura·M. J. P. Gingras·M. Sato·S. Taniguchi·M. Isobe·Y. Ueda
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Abstract

We have performed muon spin relaxation and susceptibility measurements of CaV_4O_9 and CaV_2O_5, systems in which spin gap-like behavior has been found. We observe spin freezing in the two compounds below 12K and 50K, respectively. Our results indicate the possibility that a substantial fraction of the of the vanadium magnetic moment is not in a spin singlet sate at low temperatures in either material.

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G. M. Luke, Y. Fudamoto, K. M. Kojima, M. Larkin, J. Merrin, B. Nachumi, S. Sinawi, Y. J. Uemura, M. J. P. Gingras, M. Sato, S. Taniguchi, M. Isobe, Y. Ueda. 1997-09-10. Observation of Spin Freezing in CaV4O9 and CaV2O5 by uSR. https://arxiv.org/abs/cond-mat/9709123

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