NMR study of charge ordering and magnetic correlation in vanadium oxide bronzes

We have made V-51 NMR experiments to study the charge ordering and the magn etic correlation in vanadium oxide bronzes beta-AV(6)O(15) (A= Na, Ag and C a). We observed a drastic change in the V-51 NMR spectrum accompanied by th e charge ordering. Thus we can confirm from the microscopic point of view t hat the charge ordering commonly takes place in beta-AV(6)O(15) (A= Na, Ag and Ca). A charge ordering structure is also discussed with a magnetic stru cture.