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Spin dynamics and magnetic order in magnetically frustrated Tb2Sn2O7

P. Dalmas de Reotier·A. Yaouanc·L. Keller·A. Cervellino·B. Roessli·C. Baines·A. Forget·C. Vaju·P. C. M. Gubbens·A. Amato·P. J. C. King
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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^{-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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P. Dalmas de Reotier, A. Yaouanc, L. Keller, A. Cervellino, B. Roessli, C. Baines, A. Forget, C. Vaju, P. C. M. Gubbens, A. Amato, P. J. C. King. 2006-03-14. Spin dynamics and magnetic order in magnetically frustrated Tb2Sn2O7. https://doi.org/10.1103/physrevlett.96.127202

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