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Intrinsic and extrinsic nonstationary field-driven processes in the spin-ice compound Dy_{2}Ti_{2}O_{7}
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Erfanifam, S., Zherlitsyn, S., Wosnitza, J., Moessner, R., Petrenko, Oleg, Balakrishnan, Geetha and Zvyagin, A. (2011) Intrinsic and extrinsic nonstationary field-driven processes in the spin-ice compound Dy_{2}Ti_{2}O_{7}. Physical Review B (Condensed Matter and Materials Physics), Vol.84 (No.22). article no.220404. doi:10.1103/PhysRevB.84.220404 ISSN 1098-0121.
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Official URL: http://dx.doi.org/10.1103/PhysRevB.84.220404
Abstract
Nonequilibrium processes are probed by ultrasound waves in the spin-ice material Dy(2)Ti(2)O(7) 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 similar to 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.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||
| Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | ||||
| Publisher: | American Physical Society | ||||
| ISSN: | 1098-0121 | ||||
| Official Date: | December 2011 | ||||
| Dates: |
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| Volume: | Vol.84 | ||||
| Number: | No.22 | ||||
| Page Range: | article no.220404 | ||||
| DOI: | 10.1103/PhysRevB.84.220404 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Institute of Chemistry of V. N. Karazin Kharkov National University |
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