Evidence for gapped spin-wave excitations in the frustrated Gd2Sn2O7 pyrochlore antiferromagnet from low-temperature specific heat measurements

Abstract

We have measured the low-temperature specific heat of the geometrically frustrated pyrochlore Heisenberg antiferromagnet Gd2Sn2O7 in zero magnetic field. The specific heat is found to drop exponentially below approximately 350 mK. This provides evidence for a gapped spin-wave spectrum due to an anisotropy resulting from single ion effects and long-range dipolar interactions. The data are well fitted by linear spin-wave theory, ruling out unconventional low energy magnetic excitations in this system, and allowing a determination of the pertinent exchange interactions in this material.

References in corpus (13)

• Er2Ti2O7: Evidence of Order by Disorder in a Frustrated Antiferromagnet
• First Order Transition in the Spin Dynamics of Geometrically Frustrated Yb2Ti2O7
• Order induced by dipolar interactions in a geometrically frustrated antiferromagnet
• Muon Spin Relaxation Investigation of the Spin Dynamics of Geometrically Frustrated Antiferromagnets Y2Mo2O7 and Tb2Mo2O7 Static Critical Behavior of the Spin-Freezing
• Magnetic ordering in Gd2Sn2O7: the archetypal Heisenberg pyrochlore antiferromagnet
• Magnetic density of states at low energy in geometrically frustrated systems
• Direct evidence for a dynamical ground state in the highly frustrated Tb${}_2$Sn${}_2$O${}_7$ pyrochlore
• Quantum spin fluctuations in the dipolar Heisenberg-like rare earth pyrochlores
• Transition and spin dynamics at very low temperature in the pyrochlores Yb2Ti2O7 and Gd2Sn2O7
• Effective nuclear temperature in a fluctuating spin system
• Spin Hamiltonian, Competing Small Energy Scales and Incommensurate Long Range Order in the Highly Frustrated Gd3Ga5O12 Garnet Antiferromagnet
• Low temperature specific heat and possible gap to magnetic excitations in the Heisenberg pyrochlore antiferromagnet Gd2Sn207
• ESR study of the single-ion anisotropy in the pyrochlore antiferromagnet Gd2Sn2O7

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• Frustration and anisotropic exchange in ytterbium magnets with edge-shared octahedra
• Magnetic Frustration in Lead Pyrochlores
• Order-by-Disorder in the XY Pyrochlore Antiferromagnet Revisited
• Magnetothermodynamics of the Ising Antiferromagnet Dy2Ge2O7
• Novel Strongly Spin-Orbit Coupled Quantum Dimer Magnet: Yb${}_2$Si${}_2$O${}_7$
• Classical dipoles on the kagome lattice
• Magnetic field induced ordering in SrDy2O4
• Magnetic excitations in the XY-pyrochlore antiferromagnet Er${}_2$Ti${}_2$O${}_7$
• Juxtaposition of Spin Freezing and Long Range Order in a Series of Geometrically Frustrated Antiferromagnetic Gadolinium Garnets
• Entanglement area law from specific heat capacity
• Magnetic excitations in dipolar pyrochlore antiferromagnet Gd${}_2$Sn${}_2$O${}_7$
• Persistent spin dynamics intrinsic to amplitude-modulated long-range magnetic order
• Probing short-range magnetic order in a geometrically frustrated magnet by spin Seebeck effect
• Anisotropic exchange Hamiltonian, magnetic phase diagram and domain inversion of Nd${}_2$Zr${}_2$O${}_7$
• Relief of Frustration in the Heisenberg Pyrochlore Antiferromagnet Gd${}_2$Pt${}_2$O${}_7$
• Spin excitations in the quantum dipolar magnet Yb(BaBO${}_3$)${}_3$
• Calculation of the Expected Zero Field Muon Relaxation Rate in the Geometrically Frustrated Rare Earth Pyrochlore Gd2Sn2O7 Antiferromagnet
• Beyond magnons in Nd2ScNbO7: An Ising pyrochlore antiferromagnet with all in all out order and random fields
• Spin Correlations in the Dipolar Pyrochlore Antiferromagnet Gd2Sn2O7
• Persistence of the flat band in a kagome magnet with dipolar interactions
• Anisotropic phase diagram and spin fluctuations of the hyperkagome magnet Gd3Ga5O12 as revealed by sound velocity measurements
• Spiral spin liquid in a frustrated honeycomb antiferromagnet: A single-crystal study of GdZnPO
• Antiferromagnetic ordering and critical behavior induced giant magnetocaloric effect in distorted kagome lattice Gd${}_3$BWO${}_9$