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Document Type
Article
Date of this Version
2019
Citation
AIP Advances 9, 125049 (2019)
Abstract
The effect of micromagnetic boundary conditions on the Berry curvature and topological Hall effect in granular nanostructures is investi- gated by model calculations. Both free surfaces and grain boundaries between interacting particles or grains affect the spin structure. The Dzyaloshinskii-Moriya interactions yield corrections to the Erdmann-Weierstrass boundary conditions, but the Berry curvature remains an exclusive functional of the local spin structure, which greatly simplifies the treatment of nanostructures. An explicit example is a model nanostructure with cylindrical symmetry whose spin structure is described by Bessel function and which yields a mean-field-type Hall-effect contribution that can be related to magnetic-force-microscopy images.
Included in
Atomic, Molecular and Optical Physics Commons, Condensed Matter Physics Commons, Engineering Physics Commons, Other Physics Commons
Comments
© Author(s) 2019
Open access
doi: 10.1063/1.5130477