Magnetic domain wall pinning in cobalt ferrite microstructures

Ruiz-Gómez, Sandra; Mandziak, Anna; Martín-García, Laura; Prieto, J. E.; Prieto, Pilar; Munuera, Carmen; Foerster, Michael; Quesda, Adrián; Aballe, Lucía; Figuera, Juan de la

doi:10.1016/j.apsusc.2022.154045

Cited by 10 publications

(1 citation statement)

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“…22 The geometry and directions of the X-ray beam relative to the applied magnetic field are shown in the schematic in Figure 4. We note that, as we have discussed for spinel islands grown on Ru(0001), there are two different types of domain patterns: for very thin islands, the domain walls are often pinned by the defects induced by the substrate steps, 36 while taller islands tend to have domains governed by shape anisotropy. 4 The saturation magnetization of the magnetite islands grown on Ru is expected to be of a magnitude similar to that of the bulk material, as estimated from comparisons of the domain wall width with micromagnetic simulations.…”

Section: ■ Results and Discussionmentioning

confidence: 58%

A Platform for Addressing Individual Magnetite Islands Grown Epitaxially on Ru(0001) and Manipulating Their Magnetic Domains

Ruiz-Gómez

M.²,

Fernández-González

et al. 2023

Crystal Growth & Design

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We have grown high-quality magnetite micrometric islands on ruthenium stripes on sapphire through a combination of magnetron sputtering (Ru film), high-temperature molecular beam epitaxy (oxide islands), and optical lithography. The samples have been characterized by atomic force microscopy, Raman spectroscopy, X-ray absorption and magnetic circular dichroism in a photoemission microscope. The magnetic domains on the magnetite islands can be modified by the application of current pulses through the Ru stripes in combination with magnetic fields. The modification of the magnetic domains is explained by the Oersted field generated by the electrical current flowing through the stripes underneath the magnetite nanostructures. The fabrication method is applicable to a wide variety of rock salt and spinel oxides.

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Section: ■ Results and Discussionmentioning

confidence: 58%