Muon spin relaxation and susceptibility studies of the pure and diluted spin 1/2 kagomé-like lattice system (CuxZn(1-x))3V2O7(OH2) 2H2O.
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.
Fukaya
A
A
Physics Department, Columbia University, 538 West 120th Street, New York, New York 10027, USA.
Fudamoto
Y
Y
Gat
I M
IM
Ito
T
T
Larkin
M I
MI
Savici
A T
AT
Uemura
Y J
YJ
Kyriakou
P P
PP
Luke
G M
GM
Rovers
M T
MT
Kojima
K M
KM
Keren
A
A
Hanawa
M
M
Hiroi
Z
Z