Magnetic excitations from the edge-sharing CuO2 chains in Ca2Y2Cu5O10 - art. no. 180403

Neutron inelastic scattering experiments were performed on the quasi-one-di mensional magnet Ca2Y2Cu5O10, which consists of the ferromagnetic edge-shar ing CuO2 chains. The magnetic excitation peak width in energy becomes broad er with increasing Q along the chain although sharp excitations are observe d around the zone center and perpendicular to the chain. We revealed that t he anomalous magnetic excitation spectra are caused mainly by the antiferro magnetic interchain interactions.