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Kustov, Sergey, Liubimova, Iuliia, Corró, Miguel, Torrens-Serra, Joan, Wang, Xiebin, Haines, Sebastian 
ORCID: https://orcid.org/0000-0002-1274-8329 and Salje, E. K. H.
(2019)
Temperature chaos, memory effect, and domain fluctuations in the spiral antiferromagnet Dy.
Scientific Reports, 9.
ISSN 2045-2322
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Abstract
The spiral antiferromagnetic phase of polycrystalline dysprosium between 140 K and the Néel temperature at 178 K and its domain wall (DW) dynamics were investigated using high-resolution ultrasonic spectroscopy. Two kinetic processes of quasi-static DW motion occur under non-isothermal and isothermal conditions. A “fast” process is proportional to the rate of the temperature change and results in a new category of anelastic phenomena: magnetic transient ultrasonic internal friction (IF). This IF, related to fast moving magnetic DWs, decays rapidly after interruptions of cooling/heating cycles. A second, “slow” kinetic process is seen as logarithmic IF relaxation under isothermal conditions. This second process is glass-like and results in memory and temperature chaos effects. Low-frequency thermal fluctuations of DWs, previously detected by X-ray photon correlation spectroscopy, are related to critical fluctuations with Brownian motion-like dynamics of DWs.
| Item Type: | Article |
|---|---|
| Faculty \ School: | Faculty of Science > School of Physics |
| UEA Research Groups: | Faculty of Science > Research Groups > Centre for Photonics and Quantum Science |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 20 Jan 2022 08:30 |
| Last Modified: | 09 Feb 2023 13:50 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/83075 |
| DOI: | 10.1038/s41598-019-41566-7 |
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