Unconventional Magnetization Processes and Thermal Runaway in Spin-Ice Dy₂Ti₂O₇

We investigate the nonequilibrium behavior of the spin-ice Dy₂Ti₂O₇ by studying its magnetization as a function of the field sweep rate. Below the enigmatic ''freezing'' temperature T<sub>equil</sub> ≈ 600 mK, we find that even the slowest sweeps fail to yield the equ...

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Detalles Bibliográficos
Autores principales: Slobinsky, D., Castelnovo, Claudio, Borzi, Rodolfo Alberto, Gibbs, Alexandra S., Mackenzie, Andrew P., Moessner, Roderich, Grigera, Santiago Andrés
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Ciencias Exactas
Física
nonequilibrium behavior
spin-ice
magnetization
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126312
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126312
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
nonequilibrium behavior
spin-ice
magnetization
spellingShingle Ciencias Exactas
Física
nonequilibrium behavior
spin-ice
magnetization
Slobinsky, D.
Castelnovo, Claudio
Borzi, Rodolfo Alberto
Gibbs, Alexandra S.
Mackenzie, Andrew P.
Moessner, Roderich
Grigera, Santiago Andrés
Unconventional Magnetization Processes and Thermal Runaway in Spin-Ice Dy₂Ti₂O₇
topic_facet Ciencias Exactas
Física
nonequilibrium behavior
spin-ice
magnetization
description We investigate the nonequilibrium behavior of the spin-ice Dy₂Ti₂O₇ by studying its magnetization as a function of the field sweep rate. Below the enigmatic ''freezing'' temperature T<sub>equil</sub> ≈ 600 mK, we find that even the slowest sweeps fail to yield the equilibrium magnetization curve and instead give an initially much flatter curve. For higher sweep rates, the magnetization develops sharp steps accompanied by similarly sharp peaks in the temperature of the sample. We ascribe the former behavior to the energy barriers encountered in the magnetization process, which proceeds via flipping of spins on filaments traced out by the field-driven motion of the gapped, long-range interacting magnetic monopole excitations. The peaks in temperature result from the released Zeeman energy not being carried away efficiently; the resulting heating triggers a chain reaction.
format Articulo
Articulo
author Slobinsky, D.
Castelnovo, Claudio
Borzi, Rodolfo Alberto
Gibbs, Alexandra S.
Mackenzie, Andrew P.
Moessner, Roderich
Grigera, Santiago Andrés
author_facet Slobinsky, D.
Castelnovo, Claudio
Borzi, Rodolfo Alberto
Gibbs, Alexandra S.
Mackenzie, Andrew P.
Moessner, Roderich
Grigera, Santiago Andrés
author_sort Slobinsky, D.
title Unconventional Magnetization Processes and Thermal Runaway in Spin-Ice Dy₂Ti₂O₇
title_short Unconventional Magnetization Processes and Thermal Runaway in Spin-Ice Dy₂Ti₂O₇
title_full Unconventional Magnetization Processes and Thermal Runaway in Spin-Ice Dy₂Ti₂O₇
title_fullStr Unconventional Magnetization Processes and Thermal Runaway in Spin-Ice Dy₂Ti₂O₇
title_full_unstemmed Unconventional Magnetization Processes and Thermal Runaway in Spin-Ice Dy₂Ti₂O₇
title_sort unconventional magnetization processes and thermal runaway in spin-ice dy₂ti₂o₇
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/126312
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