Magnetic Skyrmions

Achieving purely electrical detection of skyrmions is crucial as it reveals their presence or absence, thus enabling efficient reading processes in racetrack memory devices. In my research, I focus on conducting transport studies, specifically magnetoresistance (MR) and Hall measurements, to effectively detect magnetic skyrmions. 

The shape-induced anisotropy of the nanostructure morphology affects the MR signature of magnetic state transition with respect to the direction of applied magnetic field and current density. After acknowledging the evolution of magnetic spin textures and enhanced anisotropic MR (AMR) signal in B20 cubic nanowires (NWs) along the NW growth direction, I assessed the critical fields for magnetic state transitions at different temperatures and applied magnetic field as represented in a magnetic phase diagram . 

Nanostructures morphology such as NWs and nanoplates (NPLs) of these cubic B20 materials could give access to the complete study of three-dimensional structure of skyrmions. Magnetic skyrmion hosting materials with bulk DMI host Bloch-type skyrmion as string-like structure along the thickness of the sample. I conducted magnetotransport measurements on FeGe NWs and Fe1-xCoxGe NPLs that have shown some unusual magnetotransport associated with the creation and annihilation of topological magnetic skyrmion strings in FeGe nanostructures. These unique and prominent MR features in nanostructures enable the sensitive detection of thermodynamically stable skyrmion strings (SkS) over a wide range of temperatures and revealed an unexplored stability regime in nanostructures.

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