Field Induced Order and Spin Waves in the Pyrochlore Antiferromagnet Tb2Ti2O7
K.C. Rule, J.P.C. Ruff, B.D. Gaulin, S.R. Dunsiger, J.S. Gardner, J.P., Clancy, M.J. Lewis, H.A. Dabkowska, I Mirebeau, P. Manuel, Y. Qiu, J.R.D., Copley
TL;DR
This study investigates the magnetic phases and spin wave excitations in Tb2Ti2O7 under varying magnetic fields, revealing a transition from a disordered paramagnet to ordered phases with continuous spin dynamics.
Contribution
It provides detailed neutron scattering data showing field-induced magnetic order and spin waves in Tb2Ti2O7, highlighting the presence of non-Ising spin behavior.
Findings
Disordered cooperative paramagnet at zero field
Field-induced magnetic Bragg peaks indicating polarized paramagnet
Observation of spin wave excitations in the ordered phase
Abstract
High resolution time-of-flight neutron scattering measurements on Tb2Ti2O7 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, terbium titanate 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.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.