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  • Title: Muon spin relaxation and susceptibility studies of the pure and diluted spin 1/2 kagomé-like lattice system (CuxZn(1-x))3V2O7(OH2) 2H2O.
    Author: Fukaya A, Fudamoto Y, Gat IM, Ito T, Larkin MI, Savici AT, Uemura YJ, Kyriakou PP, Luke GM, Rovers MT, Kojima KM, Keren A, Hanawa M, Hiroi Z.
    Journal: Phys Rev Lett; 2003 Nov 14; 91(20):207603. PubMed ID: 14683396.
    Abstract:
    Muon spin relaxation and magnetic susceptibility measurements have been performed on the pure and diluted spin 1/2 kagomé system (CuxZn(1-x))3V2O7(OH)2 2H2O. In the pure x=1 system we found a slowing down of Cu spin fluctuations with decreasing temperature towards T approximately 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.
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