Spin-Waves in the Pseudo 1-D Ferromagnet RbFeCl sub 3

摘要

We have measured by means of neutron inelastic scattering the spin-wave dispersion in the pseudo 1-d ferromagnet RbFeCl sub 3 at T=1.5 K. The observed dispersion in the hexagonal plane is found to disagree both with the planar triangular magnetic structure and with the small interchain exchange previously assumed. A new model with conical structure (theta=54 exp 0 ) and Spin Hamiltonian parameters J=4.2 K J'=-1.2 K D*=8 K is proposed. (Atomindex citation 11:553548)