Noncollinear Edge Magnetism in Nanoribbons of Fe3GeTe2 and Fe3GaTe2
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| Název: | Noncollinear Edge Magnetism in Nanoribbons of Fe3GeTe2 and Fe3GaTe2 |
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| Autoři: | Cardias, Ramon, Bergman, Anders, 1978, Strand, Hugo U. R., Muniz, R. B., Costa, Marcio |
| Zdroj: | Nano Letters. 25(31):11797-11802 |
| Témata: | magnetism, field-free switching, 2D materials, spin dynamics, spin orbit torque, spintronics |
| Popis: | Fe3GeTe2 and Fe3GaTe2 are ferromagnetic conducting materials of van der Waals type with unique magnetic properties that are highly promising for the development of new spintronic, orbitronic, and magnonic devices. Even in the form of two-dimensional-like ultrathin films, they exhibit a relatively high Curie temperature, magnetic anisotropy perpendicular to the atomic planes, and multiple types of Hall effects. We explore nanoribbons made from single layers of these materials and show that they display noncollinear magnetic ordering at their edges. This magnetic inhomogeneity allows angular momentum currents to generate magnetic torques at the sample edges, regardless of their polarization direction, significantly enhancing the effectiveness of magnetization manipulation in these systems. We also demonstrate that it is possible to rapidly reverse the magnetization direction of these nanostructures by means of spin–orbit and spin-transfer torques with rather low current densities, making them quite propitious for nonvolatile magnetic memory units. |
| Popis souboru: | electronic |
| Přístupová URL adresa: | https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-567229 https://doi.org/10.1021/acs.nanolett.5c01890 |
| Databáze: | SwePub |
Nájsť tento článok vo Web of Science | Abstrakt: | Fe3GeTe2 and Fe3GaTe2 are ferromagnetic conducting materials of van der Waals type with unique magnetic properties that are highly promising for the development of new spintronic, orbitronic, and magnonic devices. Even in the form of two-dimensional-like ultrathin films, they exhibit a relatively high Curie temperature, magnetic anisotropy perpendicular to the atomic planes, and multiple types of Hall effects. We explore nanoribbons made from single layers of these materials and show that they display noncollinear magnetic ordering at their edges. This magnetic inhomogeneity allows angular momentum currents to generate magnetic torques at the sample edges, regardless of their polarization direction, significantly enhancing the effectiveness of magnetization manipulation in these systems. We also demonstrate that it is possible to rapidly reverse the magnetization direction of these nanostructures by means of spin–orbit and spin-transfer torques with rather low current densities, making them quite propitious for nonvolatile magnetic memory units. |
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| ISSN: | 15306984 |
| DOI: | 10.1021/acs.nanolett.5c01890 |