Spin dynamics and magnetic order in magnetically frustrated Tb2Sn2O7 |
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| Authors: | Dalmas de Réotier P Yaouanc A Keller L Cervellino A Roessli B Baines C Forget A Vaju C Gubbens P C M Amato A King P J C |
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| Institution: | Département de Recherche Fondamentale sur la Matière Condensée, CEA/DSM, 38054 Grenoble, France. |
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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 approximately 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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