Please use this identifier to cite or link to this item: http://dx.doi.org/10.25673/119415
Title: Opto-electrical approach to visualize magnetic nanostructures of chiral antiferromagnets
Author(s): Pandey, AtulLook up in the Integrated Authority File of the German National Library
Referee(s): Woltersdorf, Georg
Parkin, Stuart S. P.Look up in the Integrated Authority File of the German National Library
Goennenwein, Sebastian
Granting Institution: Martin-Luther-Universität Halle-Wittenberg
Issue Date: 2025
Extent: 1 Online-Ressource (xvi, 124 Seiten)
Type: HochschulschriftLook up in the Integrated Authority File of the German National Library
Type: PhDThesis
Exam Date: 2025-07-02
Language: English
URN: urn:nbn:de:gbv:3:4-1981185920-1213735
Abstract: This dissertation presents magnetic domain imaging methods based on Berry curvature-driven optical and magnetotransport responses. The goal is to investigate chiral antiferromagnetic materials ideal for spintronic applications. Major features of antiferromagnets are high-speed dynamics and negligible stray fields that allow for miniaturization. In this work, spatially resolved magnetic circular dichroism and anomalous Nernst effect (ANE) signals are measured to image magnetic domains. A manganese-based Weyl semimetal (Mn3Sn) exhibiting a noncollinear AF ordering is studied. The field-induced switching in Mn3Sn is observed with the spatially resolved ANE measurements down to the nanoscale regime. An enhanced optical near-field confined to the atomic force microscope tip is utilized to achieve nanoscale spatial resolution beyond the diffracted limited laser focal spot size of a few hundred nanometers.
URI: https://opendata.uni-halle.de//handle/1981185920/121373
http://dx.doi.org/10.25673/119415
Open Access: Open access publication
License: (CC BY 4.0) Creative Commons Attribution 4.0(CC BY 4.0) Creative Commons Attribution 4.0
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