Out-of-equilibrium microstates but effective thermodynamics in artificial kagome ice networks
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F25%3A00639217" target="_blank" >RIV/68081731:_____/25:00639217 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26210/26:0199894
Result on the web
<a href="https://journals.aps.org/prb/abstract/10.1103/l8qm-5wh8" target="_blank" >https://journals.aps.org/prb/abstract/10.1103/l8qm-5wh8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/l8qm-5wh8" target="_blank" >10.1103/l8qm-5wh8</a>
Alternative languages
Result language
angličtina
Original language name
Out-of-equilibrium microstates but effective thermodynamics in artificial kagome ice networks
Original language description
Using magnetic force microscopy and Monte Carlo simulations, we investigate the low-energy properties of two artificial kagome ice structures. The two systems differ in that the first series of lattices consists of an assembly of physically disconnected nanomagnets coupled via magnetostatics, whereas the second series is made of fully connected honeycomb networks. Imaging the microstates resulting from a field demagnetization protocol, and analyzing their magnetic correlations in real and reciprocal space, we observe distinct behaviors between the two lattice types. While the former exhibits properties well described by the dipolar kagome ice model equilibrated at a finite fictional temperature, the latter instead is found systematically out of equilibrium. Remarkably, this out-of-equilibrium physics can be reformulated into an at-equilibrium one by strengthening specific coupling terms in the spin Hamiltonian. We interpret this property as a result of the field-induced domain wall propagation that arises when demagnetizing a connected network, i.e., a field driven kinetic process that competes with the formation of local flux-closure configurations that minimize the magnetostatic energy. Our findings highlight how micromagnetic effects bias the selection of spin liquid microstates during a field demagnetization protocol.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review B
ISSN
2469-9950
e-ISSN
2469-9969
Volume of the periodical
112
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
094409
UT code for WoS article
001569776100003
EID of the result in the Scopus database
2-s2.0-105019789753