Field-Induced Order and Spin Waves in the Pyrochlore AntiferromagnetTb2Ti2O7 Academic Article uri icon

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abstract

  • High resolution time-of-flight neutron scattering measurements on Tb(2)Ti(2)0(7) reveal a rich low temperature phase diagram in the presence of a magnetic field applied along [110]. In zero field at T = 0.4 K, Tb(2)Ti(2)0(7) is a highly correlated cooperative paramagnet with disordered spins residing on a pyrochlore lattice of corner-sharing tetrahedra. Application of a small field condenses much of the magnetic diffuse scattering, characteristic of the disordered spins, into a new Bragg peak characteristic of a polarized paramagnet. At higher fields, a magnetically ordered phase is induced, which supports spin wave excitations indicative of continuous, rather than Ising-like, spin degrees of freedom.

authors

  • Rule, KC
  • Ruff, JPC
  • Gaulin, Bruce D
  • Dunsiger, SR
  • Gardner, JS
  • Clancy, JP
  • Lewis, MJ
  • Dabkowska, HA
  • Mirebeau, I
  • Manuel, P
  • Qiu, Y
  • Copley, JRD

publication date

  • May 5, 2006