Static Correlation and Dynamical Properties of Tb3+-moments in Tb2Ti2O7 -Neutron Scattering Study-

摘要: Static and dynamical properties of the magnetic moment system pyrochlore compound Tb2Ti2O7 with strong frustration, have been investigated down to temperature T=0.4 K by neutron scattering on a single crystal sample. The vector (Q)-dependence intensity becomes appreciable decreasing T at around 30 K, indicating development correlation. From observed energy profiles, elastic, quasi elastic inelastic components separately obtained. component corresponds diffusive motion moments within lowest states, which are formed levels Tb3+ ions. Magnetic correlation pattern can roughly reproduce Q-dependence intensities is discussed based trial calculations for clusters 7 belonging two corner-sharing tetrahedra. A possible origin glassy state, develops 1.5 discussed.