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Titolo
Novel interpretation of recent experiments on the dynamics of domain walls along ferrimagnetic strips
Autor(es)
Soggetto
Magnetism
Computational physics
Ferrimagnet
Domain wall
Clasificación UNESCO
2202.08 Magnetismo
Fecha de publicación
2020
Editore
Institute of Physics (Bristol, Gran Bretaña)
Citación
Martínez, E., Raposo, V., Alejos, Ó. (2020). Novel interpretation of recent experiments on the dynamics of domain walls along ferrimagnetic strips. J. Phys.: Condens. Matter 32 46580. https://doi.org/10.1088/1361-648x/aba7eb
Resumen
[EN] Domain wall motion along ferrimagnets is evaluated using micromagnetic simulations and a collective-coordinates model, both considering two sublattices with independent parameters. Analytical expressions are derived for strips on top of either a heavy metal or a substrate with negligible interfacial Dzyaloshinskii-Moriya Interaction. The work focuses its ndings in this latter case, with a eld-driven domain wall motion depicting precessional dynamics which become rigid at the angular momentum compensation temperature, and a current-driven dynamics presenting more complex behavior, depending on the polarization factors for each sublattice.
Importantly, our analyses provide also novel interpretation of recent evidence on current-driven domain wall motion, where walls move either along or against the current depending on temperature. Besides, our approach is able to substantiate the large non-adiabatic efective parameters found for these systems.
URI
ISSN
0953-8984
DOI
10.1088/1361-648X/aba7eb
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