ANALYSIS OF 2-MAGNON RAMAN-SCATTERING IN QUASI-ONE-DIMENSIONAL CHAIN ANTIFERROMAGNET CSMNCL3-CENTER-DOT-2H(2)O

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.