Abstract
We have measured by means of neutron inelastic scattering the spin-wave dispersion in the pseudo 1-d ferromagnet RbFeCl3 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 (θ = 54°) and Spin Hamiltonian parameters J = 4.2 K J’ = −1.2 K D* = 8 K is proposed.
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Formula (3) takes into account the quantum correction for the DS<!math!> term appropriate to S = 1 (see D.R. Fredkin and H.B. Shore, J. Phys. Chem. Solids, 31, 2159 (1969)) but not the MME correction (P.A. Lindgard and A. Kowalska, J. Phys. C, 9, 2081 (1976)).
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© 1981 Plenum Press, New York
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Petitgrand, D., Hennion, B., Radhakrishna, P., Escribe, C., Legrand, S. (1981). Spinwaves in the Pseudo 1-d Ferromagnetic RbFeCl3 . In: Devreese, J.T., Lemmens, L.F., Van Doren, V.E., Van Royen, J. (eds) Recent Developments in Condensed Matter Physics. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-1086-0_25
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DOI: https://doi.org/10.1007/978-1-4684-1086-0_25
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