Anomalous Nernst Effect-Based Near-Field Imaging of Magnetic Nanostructures.

ABSTRACT: The anomalous Nernst effect (ANE) gives rise to an electrical response transverse to magnetization and an applied temperature gradient in a magnetic metal. A nanoscale temperature gradient can be generated by the use of a laser beam applied to the apex of an atomic force microscope tip, thereby allowing for spatially resolved ANE measurements beyond the optical diffraction limit. Such a method has been previously used to map in-plane magnetized magnetic textures. However, the spatial distribution of the out-of-plane temperature gradient, which is needed to fully interpret such ANE-based imaging, was not studied. We therefore use a well-known magnetic texture, a magnetic vortex core, to demonstrate the reliability of the ANE method for imaging of magnetic domains with nanoscale resolution.

SUBMITTER: Pandey A 

PROVIDER: S-EPMC11580384 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature