Spin Dynamics and Magnetic Order in Magnetically Frustrated Tb2Sn2O7
Abstract
We report a study of the geometrically frustrated magnetic material Tb2Sn2O7 by the positive muon-spin relaxation technique. No signature of a static magnetically ordered state is detected while neutron magnetic reflections are observed in agreement with a published report. This is explained by the dynamical nature of the ground state of Tb2Sn2O7: the Tb3+ magnetic moment characteristic fluctuation time is ≃10-10s. The strong effect of the magnetic field on the muon-spin-lattice relaxation rate at low fields indicates a large field-induced increase of the magnetic density of states of the collective excitations at low energy.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2006
- DOI:
- arXiv:
- arXiv:cond-mat/0603379
- Bibcode:
- 2006PhRvL..96l7202D
- Keywords:
-
- 75.40.-s;
- 75.25.+z;
- 76.75.+i;
- Critical-point effects specific heats short-range order;
- Spin arrangements in magnetically ordered materials;
- Muon spin rotation and relaxation;
- Condensed Matter - Strongly Correlated Electrons
- E-Print:
- 5 pages, 3 figures. To appear in Physical Review Letters