V. Eremenko et al., ANALYSIS OF 2-MAGNON RAMAN-SCATTERING IN QUASI-ONE-DIMENSIONAL CHAIN ANTIFERROMAGNET CSMNCL3-CENTER-DOT-2H(2)O, Journal of magnetism and magnetic materials, 158, 1996, pp. 484-486
The two-magnon Raman scattering obtained in CsMnCl3 . 2H(2)O was analy
zed within a microscopic semi-phenomenological theory of the spin-depe
ndent polarizability of exchange-coupled magnetic ions. Good agreement
was obtained between observed and calculated polarization selection r
ules for two-magnon bands in the Raman spectra. It was shown that the
nonevident selection rule for the observation of the two-particle peak
-shape band originated mainly from magnons near the one-dimensional Br
illouin zone boundary due to the specific zig-zag-type disposition of
the Mn2+ ions in the chain structure.