title: 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 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.
authors.affiliation: Département de Recherche Fondamentale sur la Matière Condensée, CEA/DSM, 38054 Grenoble, France.
authors.forename: P
authors.initials: P
authors.lastname: Dalmas de Réotier
authors.forename: A
authors.initials: A
authors.lastname: Yaouanc
authors.forename: L
authors.initials: L
authors.lastname: Keller
authors.forename: A
authors.initials: A
authors.lastname: Cervellino
authors.forename: B
authors.initials: B
authors.lastname: Roessli
authors.forename: C
authors.initials: C
authors.lastname: Baines
authors.forename: A
authors.initials: A
authors.lastname: Forget
authors.forename: C
authors.initials: C
authors.lastname: Vaju
authors.forename: P C M
authors.initials: PC
authors.lastname: Gubbens
authors.forename: A
authors.initials: A
authors.lastname: Amato
authors.forename: P J C
authors.initials: PJ
authors.lastname: King