Current driven domain wall dynamics in ferrimagnetic strips explained by means of a two interacting sublattices model
| Autor: | Oscar Alejos, Victor Raposo, Eduardo Martínez |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Magnetism
General Physics and Astronomy FOS: Physical sciences 02 engineering and technology STRIPS Applied Physics (physics.app-ph) 01 natural sciences law.invention law Ferrimagnetism 0103 physical sciences Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Computational physics Domain wall dynamics 010302 applied physics Physics Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Physics - Applied Physics 021001 nanoscience & nanotechnology lcsh:QC1-999 2202.08 Magnetismo Current (fluid) 0210 nano-technology lcsh:Physics |
| Zdroj: | GREDOS. Repositorio Institucional de la Universidad de Salamanca instname AIP Advances, Vol 10, Iss 1, Pp 015202-015202-5 (2020) |
| Popis: | [EN] The current-driven domain wall dynamics along ferrimagnetic elements are here theoretically analyzed as a function of temperature by means of micromagnetic simulations and a one dimensional model. Contrarily to conventional effective approaches, our model takes into account the two coupled ferromagnetic sublattices forming the ferrimagnetic element. Although the model is suitable for elements with asymmetric exchange interaction and spin-orbit coupling effects due to adjacent heavy metal layers, we here focus our attention on the case of single-layer ferrimagnetic strips where domain walls adopt achiral Bloch configurations at rest. Such domain walls can be driven by either out-of-plane fields or spin transfer torques upon bulk current injection. Our results indicate that the domain wall velocity is optimized at the angular compensation temperature for both field-driven and current-driven cases. Our advanced models allow us to infer that the precession of the internal domain wall moments is suppressed at such compensation temperature, and they will be useful to interpret state-of-the art experiments on these elements. MAT2017- 87072-C4-1-P from the (Ministerio de Economía y Competitividad) Spanish Government SA299P18 from the (Consejería de Educación) of Junta de Castilla y León. |
| Databáze: | OpenAIRE |
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