Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2001-11-24
J. Phys. Soc. Jpn. 71(2002) 599
Physics
Condensed Matter
Strongly Correlated Electrons
10 pages, 12 figures, to be published in J. Phys. Soc. Jpn. 71(2002)No.2 599
Scientific paper
10.1143/JPSJ.71.599
Static and dynamical properties of the magnetic moment system of pyrochlore compound Tb2Ti2O7 with strong magnetic frustration, have been investigated down to the temperature T=0.4 K by neutron scattering on a single crystal sample. The scattering vector (Q)-dependence of the magnetic scattering intensity becomes appreciable with decreasing T at around 30 K, indicating the development of the magnetic correlation. From the observed energy profiles, the elastic, quasi elastic and inelastic components have been separately obtained. The quasi elastic component corresponds to the diffusive motion of the magnetic moments within the lowest states, which are formed of the lowest energy levels of Tb3+ ions. Magnetic correlation pattern which can roughly reproduce the Q-dependence of the scattering intensities of the elastic and quasi elastic component is discussed based on the trial calculations for clusters of 7 moments belonging to two corner-sharing tetrahedra. A possible origin of the glassy state, which develops at around 1.5 K with decreasing T is discussed.
Harashina Hiroshi
Ito Masafumi
Kadowaki Hiroaki
Kakurai Kazuhisa
Kanada Masaki
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