title: Robustness of topological Hall effect of nontrivial spin textures.
abstract: We analyze the topological Hall conductivity (THC) of topologically nontrivial spin textures like magnetic vortices and skyrmions and investigate its possible application in the readback for magnetic memory based on those spin textures. Under adiabatic conditions, such spin textures would theoretically yield quantized THC values, which are related to topological invariants such as the winding number and polarity, and as such are insensitive to fluctuations and smooth deformations. However, in a practical setting, the finite size of spin texture elements and the influence of edges may cause them to deviate from their ideal configurations. We calculate the degree of robustness of the THC output in practical magnetic memories in the presence of edge and finite size effects.
authors.affiliation: Department of Electrical Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore.
authors.forename: Mansoor B A
authors.initials: MB
authors.lastname: Jalil
authors.affiliation: Data Storage Institute, Agency for Science, Technology and Research (A*STAR) DSI Building, 5 Engineering Drive 1, Singapore 117608, Singapore.
authors.forename: Seng Ghee
authors.initials: SG
authors.lastname: Tan