Magnetic domain size tuning in asymmetric Pd/Co/W/Pd multilayers with perpendicular magnetic anisotropy

Autor(es)

Dugato, D. A. ^{[1, 2]} ; Brandao, J. ^[2] ; Seeger, R. L. ^[1] ; Beron, F. ^[3] ; Cezar, J. C. ^[2] ; Dorneles, L. S. ^[1] ; Mori, T. J. A. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Fed Santa Maria, Dept Fis, BR-97105900 Santa Maria, RS - Brazil

^[2] CNPEM, LNLS, BR-13083970 Campinas, SP - Brazil

^[3] Univ Estadual Campinas UNICAMP, IFGW, BR-13083859 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Applied Physics Letters; v. 115, n. 18 OCT 28 2019.
• Citações Web of Science: 0

Resumo

Magnetic multilayers presenting perpendicular magnetic anisotropy (PMA) have great potential for technological applications. On the path to develop further magnetic devices, one can adjust the physical properties of multilayered thin films by modifying their interfaces, thus determining the magnetic domain type, chirality, and size. Here, we demonstrate the tailoring of the domain pattern by tuning the perpendicular anisotropy, the saturation magnetization, and the interfacial Dzyaloshinskii-Moriya interaction (iDMI) in Pd/Co/Pd multilayers with the insertion of an ultrathin tungsten layer at the top interface. The average domain size decreases around 60% when a 0.2 nm thick W layer is added to the Co/Pd interface. Magnetic force microscopy images and micromagnetic simulations were contrasted to elucidate the mechanisms that determine the domain textures and sizes. Our results indicate that both iDMI and PMA can be tuned by carefully changing the interfaces of originally symmetric multilayers, leading to magnetic domain patterns promising for high density magnetic memories. (AU)

• Processo FAPESP: 17/10581-1 - Fenômenos emergentes em sistemas de dimensões reduzidas
• Beneficiário: Pascoal Jose Giglio Pagliuso
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais
• Processo FAPESP: 12/51198-2 - Fabricação e estudo da estrutura eletrônica de heteroestruturas de óxidos multiferróicos
• Beneficiário: Júlio Criginski Cezar
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores