Two-magnon Raman scattering in KMnF3
- 7 December 1975
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 8 (23) , 4062-4070
- https://doi.org/10.1088/0022-3719/8/23/019
Abstract
The two-magnon Raman spectrum of KMnF3 has been investigated as a function of temperature, and peak position and width parameters obtained. A Green function theory developed by Balucani and Tognetti (1973) is applied to the results and accurately describes the observed temperature dependence for T/TN3 can be adequately represented by the cubic perovskite structure despite structural distortions and the spin canting for temperatures below 81K. The Raman results predict a value of 4.98+or-0.07 cm-1 for the isotropic Heisenberg exchange constant.Keywords
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