Abstract
Despite the observation of magnetic neutron reflections at low temperatures, muon-spinexperiments have suggested the ground state of the geometrically frustrated magnetic materialTb2Sn2O7 to be dynamical. This unique situation requires additional characterizations of thismagnetic ground state. Here we report a neutron spin-echo investigation which supportsthe existence of a dynamical component in the ground state. This result is backed by athorough analysis of the diffraction profiles. A physical model is put forward inwhich the energy splitting between the ground and first excited states of theTb3+ ion is comparable to other energies present in this frustrated system.
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