We 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
Frustration-driven micromagnetic structure in Fe/CoO/Fe thin films layered systems
VAVASSORI, Paolo;
2009
Abstract
We 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 discussedI documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.