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 ~ 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.

5 pages, 3 figures. To appear in Physical Review Letters

References in corpus (2)

• Magnetic ordering in Gd2Sn2O7: the archetypal Heisenberg pyrochlore antiferromagnet
• Magnetic density of states at low energy in geometrically frustrated systems

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• Magnetism in Geometrically Frustrated YMnO3 Under Hydrostatic Pressure Studied with Implanted Muons
• The kagome staircase compounds Ni${}_3$V${}_2$O${}_8$ and Co${}_3$V${}_2$O${}_8$ studied with implanted muons
• Investigation of the magnetic fluctuations in Tb${}_2$Sn${}_2$O${}_7$ ordered spin ice by high resolution energy-resolved neutron scattering
• Spin Correlations in the Geometrically Frustrated Pyrochlore Tb2Mo2O7