Magnetic interactions in sodium cobaltate with square and striped superstructures
Previous studies of the spin wave dispersion of sodium cobaltate suggested a rather surprising 3D exchange model. Our measurements using polarised neutrons on IN20 of Na_0.77CoO_2 have allowed us to separate the magnetic excitations from the phonon background. The results suggest a key role for the sodium superstructure, and we are developing a more physical exchange model with much smaller interplanar coupling so that the system is, in fact, quasi-2D. We now propose to perform an inelastic neutron scattering study of Na_0.8CoO_2 using IN20 in polarised setup. This sample forms square or striped superstructures, depending on cooling rate. Thus we propose to measure the spin wave dispersion for two different superstructures on the same crystal.
Please note that you will need to login with your ILL credentials to download the data.
Download DataThe recommended format for citing this dataset in a research publication is in the following format:
GOFF Jonathan P.; CEMAL Eron; ENDERLE Mechthild; PORTER Dan and ROGER Michel. (2013). Magnetic interactions in sodium cobaltate with square and striped superstructures. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.4-01-1271
ILL has partnered with DataCite as the registration agency
for data persistent identifiers.