Quantum-Classical Reentrant Relaxation Crossover in Dy2Ti2O7 Spin-Ice

Abstract

We have studied spin relaxation in the spin ice compound Dy2Ti2O7 through measurements of the a.c. magnetic susceptibility. While the characteristic spin relaxation time is thermally activated at high temperatures, it becomes almost temperature independent below Tcross ~ 13 K, suggesting that quantum tunneling dominates the relaxation process below that temperature. As the low-entropy spin ice state develops below Tice ~ 4 K, the spin relaxation time increases sharply with decreasing temperature, suggesting the emergence of a collective degree of freedom for which thermal relaxation processes again become important as the spins become highly correlated.

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Cited by in corpus (35)

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• Power-law spin correlations in pyrochlore antiferromagnets
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• Revisiting Static and Dynamic Spin Ice Correlations in Ho2Ti2O7
• Neutron Scattering Investigation of the Spin Ice State in Dy2Ti2O7
• Quantum and thermal spin relaxation in diluted spin ice: Dy(2-x)MxTi2O7 (M = Lu, Y)
• Dynamics of the Magnetic Susceptibility Deep in the Coulomb Phase of the Dipolar Spin Ice Material Ho2Ti2O7
• Crystal field parameters of the rare earth pyrochlores $R_2$Ti${}_2$O${}_7$ ($R$ = Tb, Dy, Ho)
• Geometrical Magnetic Frustration in Rare Earth Chalcogenide Spinels
• Slow spin relaxation in a highly polarized cooperative paramagnet
• Low Temperature Specific Heat of Dy${}_2$Ti${}_2$O${}_7$ in the Kagome Ice State
• New physics in frustrated magnets: Spin ices, monopoles, etc
• Magnetothermodynamics of the Ising Antiferromagnet Dy2Ge2O7
• Magnetocaloric Study of Spin Relaxation in `Frozen' Dipolar Spin Ice Dy2Ti2O7
• Correlated Quantum Tunnelling of Monopoles in Spin Ice
• Field-Induced Transition on Triangular Plane in the Spin Ice Compound Dy2Ti2O7
• First order metamagnetic transition in Ho2Ti2O7 observed by vibrating coil magnetometry at milli-Kelvin temperatures
• Spin ice behavior in Dy2Sn2-xSbxO7+x/2 and Dy2NbScO7
• Investigations of the effect of nonmagnetic Ca substitution for magnetic Dy on spin-freezing in Dy2Ti2O7
• High temperature spin-freezing transition in Pyrochlore Eu2Ti2O7: A new observation from ac-susceptibility
• Phonon-mediated spin-flipping mechanism in the spin ices Dy${}_2$Ti${}_2$O${}_7$ and Ho${}_2$Ti${}_2$O${}_7$
• High temperature onset of field-induced transitions in the spin-ice compound Dy2Ti2O7
• Magnetothermal study of Dy Stuffed Spin Ice: Dy2(DyxTi2-x)O7-x/2
• Experimental observation of magnetoelectricity in spin ice Dy${}_2$Ti${}_2$O${}_7$
• Anisotropic paramagnetism of monoclinic Nd2Ti2O7 single crystals
• The 3D Kasteleyn transition in dipolar spin ice: a numerical study with the Conserved Monopoles Algorithm
• Emergent order in the spin-frustrated system DyxTb2-xTi2O7 studied by ac susceptibility measurements
• Electronic structure by X-ray absorption spectroscopy and observation offield induced unusually slowspin relaxation from magnetic properties in pyrochlore Eu${}_{2-x}$Fe${}_x$Ti${}_2$O${}_7$
• Magnetization beyond the Ising limit of Ho${}_2$Ti${}_2$O${}_7$
• Possible glass-like random singlet magnetic state in 1T-TaS2
• Extremely slow non-equilibrium monopole dynamics in classical spin ice
• Traversing the pyrochlore stability diagram; microwave-assisted synthesis and discovery of mixed B-site Ln${}_2$InSbO${}_7$ family
• Revisiting spin ice physics in the ferromagnetic Ising pyrochlore Pr${}_2$Sn${}_2$O${}_7$
• Anomalous out-of-equilibrium dynamics in the spin-ice material Dy${}_2$Ti${}_2$O${}_7$ under moderate magnetic fields
• Tuning interactions in the spin-ice materials Dy${}_2$Ge${}_{2-x}$Si${}_x$O${}_7$ by silicon substitution