Intrinsic and extrinsic nonstationary field-driven processes in the spin-ice compound Dy2Ti2O7

Abstract

Nonequilibrium processes are probed by ultrasound waves in the spin-ice material Dy2Ti2O7 at low temperatures. The sound velocity and the sound attenuation exhibit a number of anomalies versus applied magnetic field for temperatures below the "freezing" temperature of ~500 mK. These robust anomalies can be seen for longitudinal and transverse acoustic modes for different field directions. The anomalies show a broad hysteresis. Most notable are peaks in the sound velocity, which exhibit two distinct regimes: an intrinsic (extrinsic) one in which the data collapse for different sweep rates when plotted as function of field strength (time). We discuss our observations in context of the emergent quasiparticles which govern the low-temperature dynamics of the spin ice.

arXiv comment5 pages, 3 Encapsulated Postscript figures

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Cited by in corpus (13)

• Magnetically originated phonon-glass-like behavior in Tb_2Ti_2O_7 single crystal
• New physics in frustrated magnets: Spin ices, monopoles, etc
• Thermal Conductivity and Specific Heat of the Spin-Ice Compound Dy${}_2$Ti${}_2$O${}_7$: Experimental Evidence for Monopole Heat Transport
• AC Wien effect in spin ice, manifest in non-linear non-equilibrium susceptibility
• Dimensionality and irreversibility of field-induced transitions in SrDy2O4
• Ultrasonic investigations of spin-ices Dy${}_2$Ti${}_2$O${}_7$ and Ho${}_2$Ti${}_2$O${}_7$ in and out of equilibrium
• An irreversible magnetic-field dependence of low-temperature heat transport of spin-ice compound Dy_2Ti_2O_7 in a [111] field
• Acoustic signatures of the phases and phase transitions in Yb${}_2$Ti${}_2$O${}_7$
• Dynamic behavior of magnetic avalanches in the spin-ice compound Dy${}_2$Ti${}_2$O${}_7$
• Low-temperature thermal conductivity of Dy_2Ti_2O_7 and Yb_2Ti_2O_7 single crystals
• Low-temperature muon spin rotation studies of the monopole charges and currents in Y doped Ho2Ti2O7
• Extremely slow non-equilibrium monopole dynamics in classical spin ice
• Magnetoelastic coupling at the field-induced transition in EuAl${}_{12}$O${}_{19}$