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Topological hall effect in Pt/Co/W multilayers with different anisotropies

MPG-Autoren
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Markou,  A.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Swekis,  P.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Mourkas, A., Markou, A., Swekis, P., & Panagiotopoulos, I. (2021). Topological hall effect in Pt/Co/W multilayers with different anisotropies. Journal of Magnetism and Magnetic Materials, 530: 167937, pp. 1-6. doi:10.1016/j.jmmm.2021.167937.


Zitierlink: https://hdl.handle.net/21.11116/0000-0008-A55A-9
Zusammenfassung
The chirality of non-coplanar magnetic configurations, in magnetic materials with interfacial Dzyaloshinskii?Moriya interaction, gives rise to a local magnetic field generating an extra contribution to the anomalous Hall effect. This contribution, termed topological Hall effect (THE), is studied in three Pt/Co/W multilayered samples with different effective anisotropy. A particularity of this system, compared to similar systems which show THE, is the existence of magnetically inactive layers at the Co/W interfaces. This implies that the coupling between the layers in this series of samples is mainly magnetostatic. The samples with positive or almost zero effective anisotropy show the same characteristics. These are reproduced by micromagnetic simulations. The sample with negative effective anisotropy shows a qualitatively different behaviour that can be assigned to its radically different domain structure. The values of THE are in the range 0.1?0.25 ?? cm.