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 (9)

• Er2Ti2O7: Evidence of Order by Disorder in a Frustrated Antiferromagnet
• Muon spin rotation and relaxation in magnetic materials
• First Order Transition in the Spin Dynamics of Geometrically Frustrated Yb2Ti2O7
• Magnetic order and spin fluctuations in the spin liquid Tb$\_2$Sn$\_2$O$\_7$
• Magnetic ordering in Gd2Sn2O7: the archetypal Heisenberg pyrochlore antiferromagnet
• Magnetic density of states at low energy in geometrically frustrated systems
• Transition and spin dynamics at very low temperature in the pyrochlores Yb2Ti2O7 and Gd2Sn2O7
• Effective nuclear temperature in a fluctuating spin system
• Nanoparticle size distribution estimation by full-pattern powder diffraction analysis

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