Frustration-driven micromagnetic structure in Fe/CoO/Fe thin film layered systems
- Brambilla, A.
- Sessi, P.
- Cantoni, M.
- Finazzi, Marco
- Rougemaille, Nicolas
- Belkhou, Rachid
- Vavassori, P.
- Duò, Lamberto
- Ciccacci, F.
DOIAbstract
International audienceWe have investigated the micromagnetic structure of magnetic domains in Fe/CoO/Fe trilayer systems and the magnetization coupling between the iron layers. We observe very small magnetic domains separated by nanometer-sized domain walls in the top Fe layer for a narrow CoO thickness range. Such domains have lateral dimensions as low as 30 nm and present topologies which are very similar to those observed in the top layer of Fe/NiO/Fe trilayers. Both magnetic domain structure and Fe interlayer coupling dramatically change with the CoO thickness. The role of magnetocrystalline anisotropy and magnetic frustrations on the observed phenomenology is discussed
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