External magnetic field effects on a distorted kagome antiferromagnet.
We report bulk magnetization, and elastic and inelastic neutron scattering measurements under an external magnetic field H on the weakly coupled distorted kagome system, Cu2(OD)3Cl. Our results show that the ordered state below 6.7 K is a canted antiferromagnet and consists of large antiferromagnetic ac components and smaller ferromagnetic b components. By first-principles calculations and linear spin wave analysis, we present a simple spin Hamiltonian with nonuniform nearest neighbor exchange interactions resulting in a system of coupled spin trimers with a single-ion anisotropy that can qualitatively reproduce the spin dynamics of Cu2(OD)3Cl.
Department of Physics, University of Virginia, Charlottesville, Virginia 22904, USA.
J-H
JH
Kim
S
S
Ji
S-H
SH
Lee
B
B
Lake
T
T
Yildirim
H
H
Nojiri
H
H
Kikuchi
K
K
Habicht
Y
Y
Qiu
K
K
Kiefer