Micromagnetics of magnetic chemical modulations in soft-magnetic cylindrical nanowires
We analyze the micromagnetics of short longitudinal modulations of a high-magnetization material in cylindrical nanowires made of a soft-magnetic material of lower magnetization such as permalloy, combining magnetic microscopy, analytical modeling, and micromagnetic simulations. The mismatch of magn...
| Autores: | , , , , , , , , , , , , , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universidad Complutense de Madrid (UCM) |
| Repositorio: | Docta Complutense |
| Idioma: | inglés |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/72102 |
| Acceso en línea: | https://hdl.handle.net/20.500.14352/72102 |
| Access Level: | acceso abierto |
| Palabra clave: | 538.9 Domain-wall Giant magnetoresistance Configurations Dependence Beamline Reversal Arrays Length Física de materiales Física del estado sólido 2211 Física del Estado Sólido |
| Sumario: | We analyze the micromagnetics of short longitudinal modulations of a high-magnetization material in cylindrical nanowires made of a soft-magnetic material of lower magnetization such as permalloy, combining magnetic microscopy, analytical modeling, and micromagnetic simulations. The mismatch of magnetization induces curling of magnetization around the axis in the modulations, in an attempt to screen the interfacial magnetic charges. The curling angle increases with modulation length, until a plateau is reached with nearly full charge screening for a specific length scale delta(mod), larger than the dipolar exchange length of any of the two materials. The curling circulation can be switched by the Oersted field arising from a charge current with typical magnitude 10(12) A/m(2) for a diameter of similar to 100 nm, and reaching a maximum for delta(mod). |
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