Y. Todate et al., SPIN-WAVE EXCITATIONS IN FRUSTRATED ONE-DIMENSIONAL ANTIFERROMAGNETS KCU1-CMNCF3, Physica. B, Condensed matter, 213, 1995, pp. 179-181
The spin dynamics in the frustrated nearly one-dimensional antiferroma
gnets KCu1-cMncF3 have been investigated by time-of-flight inelastic n
eutron scattering. Although the sample with a small Mn concentration s
hows antiferromagnetic ordering, well-defined collective excitations s
uch as quantum spin excitations seen in pure KCuF3 can hardly be found
in the mixed systems (c = 0.015 and 0.055).