POLAR JAHN-TELLER CENTERS AND MAGNETIC NEUTRON-SCATTERING CROSS-SECTION IN COPPER OXIDES

A cross-section for magnetic neutron scattering in high-T-c cuprates i s obtained in the framework of the novel model of the polar singlet-tr ipler Jahn-Teller centers. The multi-mode character of the CuO4 cluste r ground manifold in the new phase of polar centers determines the dep endence of the magnetic form-factor on the local structure and charge state of the center. It is shown that magnetic inelastic neutron scatt ering in the system of the polar singlet-triplet Jahn-Teller centers p ermits to investigate the non-magnetic charge and structure excitation s, (C) 1998 Elsevier Science B.V. All rights reserved.