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.
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.
authors.affiliation: Physics Department, Columbia University, 538 West 120th Street, New York, New York 10027, USA.
authors.forename: A
authors.initials: A
authors.lastname: Fukaya
authors.forename: Y
authors.initials: Y
authors.lastname: Fudamoto
authors.forename: I M
authors.initials: IM
authors.lastname: Gat
authors.forename: T
authors.initials: T
authors.lastname: Ito
authors.forename: M I
authors.initials: MI
authors.lastname: Larkin
authors.forename: A T
authors.initials: AT
authors.lastname: Savici
authors.forename: Y J
authors.initials: YJ
authors.lastname: Uemura
authors.forename: P P
authors.initials: PP
authors.lastname: Kyriakou
authors.forename: G M
authors.initials: GM
authors.lastname: Luke
authors.forename: M T
authors.initials: MT
authors.lastname: Rovers
authors.forename: K M
authors.initials: KM
authors.lastname: Kojima
authors.forename: A
authors.initials: A
authors.lastname: Keren
authors.forename: M
authors.initials: M
authors.lastname: Hanawa
authors.forename: Z
authors.initials: Z
authors.lastname: Hiroi