Cargando…

Observation of Skyrmions at Room Temperature in Co(2)FeAl Heusler Alloy Ultrathin Film Heterostructures

Magnetic skyrmions are topological spin-textures having immense potential for energy efficient spintronic devices. Here, we report the observation of stable skyrmions in unpatterned Ta/Co(2)FeAl(CFA)/MgO thin film heterostructures at room temperature in remnant state employing magnetic force microsc...

Descripción completa

Detalles Bibliográficos
Autores principales: Husain, Sajid, Sisodia, Naveen, Chaurasiya, Avinash Kumar, Kumar, Ankit, Singh, Jitendra Pal, Yadav, Brajesh S., Akansel, Serkan, Chae, Keun Hwa, Barman, Anjan, Muduli, P. K., Svedlindh, Peter, Chaudhary, Sujeet
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6355792/
https://www.ncbi.nlm.nih.gov/pubmed/30705297
http://dx.doi.org/10.1038/s41598-018-35832-3
Descripción
Sumario:Magnetic skyrmions are topological spin-textures having immense potential for energy efficient spintronic devices. Here, we report the observation of stable skyrmions in unpatterned Ta/Co(2)FeAl(CFA)/MgO thin film heterostructures at room temperature in remnant state employing magnetic force microscopy. It is shown that these skyrmions consisting of ultrathin ferromagnetic CFA Heusler alloy result from strong interfacial Dzyaloshinskii-Moriya interaction (i-DMI) as evidenced by Brillouin light scattering measurements, in agreement with the results of micromagnetic simulations. We also emphasize on room temperature observation of multiple skyrmions which can be stabilized for suitable combinations of CFA layer thickness, perpendicular magnetic anisotropy, and i-DMI. These results provide a significant step towards designing of room temperature spintronic devices based on skyrmions in full Heusler alloy based thin films.