Spin dynamics and magnetic order in magnetically frustrated Tb2Sn2O7
de Reotier, P. Dalmas · Yaouanc, A. · Keller, L. · Cervellino, A. · Roessli, B. · Baines, C. · Forget, A. · Vaju, C. · Gubbens, P. C. M. · Amato, A. · King, P. J. C.
Original · EN
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 10⁻¹⁰ s. 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.
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