Orbital and Spin Excitations in Cobalt Oxide
arXiv:0706.3345 · doi:10.1016/j.physb.2007.10.306
Abstract
By means of neutron scattering we have determined new branches of magnetic excitations in orbitally active CoO (TN=290 K) up to 15 THz and for temperatures from 6 K to 450 K. Data were taken in the (111) direction in six single-crystal zones. From the dependence on temperature and Q we have identified several branches of magnetic excitation. We describe a model for the coupled orbital and spin states of Co2+ subject to a crystal field and tetragonal distortion.
To be published in Physica B (Proceedings of SCES07 conference in Houston)