Eintrag in der Universitätsbibliographie der TU Chemnitz
Volltext zugänglich unter
URN: urn:nbn:de:bsz:ch1-qucosa2-973044
Fedorov, Pavel
Schmidt, Oliver G. ; Fomin, Vladimir M. (Gutachter)
Current-induced domain wall motion in self-assembly of Co/Pt stripes: Towards 3D racetrack devices
Kurzfassung in englisch
This thesis offers an in-depth exploration into the design, fabrication, and performance evaluation of three-dimensional racetrack memory, a promising candidate for the next-generation spintronic device. We explore the novel approach to create a 3D magnetic memory device by combining the well-known techniques: (i) current-induced domain wall motion in stripes with perpendicular magnetic anisotropy and (ii) shapeable polymeric platform. We successfully achieved current-induced domain-wall motion in a heavy metal/ferromagnetic 3D racetrack. Additionally, we investigated the processes of writing and detecting the domain wall within this context. The second objective of this research is to analyse the influence of shape- and strain-induced effects on the behaviour of spintronic systems. By meticulously examining the spin-current generation efficiency and domain wall velocity in 2D and 3D states, we show the profound impact of geometry-induced strain, even at levels as low as 1.3%, on these crucial parameters. Additionally, we conducted a comparative analysis between glass and polymeric substrates, particularly addressing the influence of heat during the electric current pulse sequences. We show that temperature generation has a critical impact on the DW velocity, especially for narrow racetracks. In the final part of this thesis, we delve into the fabrication and characterization of antiferromagnetic/ferromagnetic heterostructures, which can enable a field-free magnetisation switching of magnetic stripes and islands. Overall, this thesis contributes to the ongoing evolution of racetrack memory technology by advancing the state-of-the-art in 3D racetrack design, fabrication, and performance optimisation.
| Universität: | Technische Universität Chemnitz | |
| Institut: | MAIN-Forschung Professur Materialsysteme der Nanoelektronik (Prof. Schmidt) | |
| Fakultät: | Fakultät für Elektrotechnik und Informationstechnik | |
| Dokumentart: | Dissertation | |
| Betreuer: | Schmidt, Oliver G. | |
| DOI: | doi:10.60687/2025-0092 | |
| SWD-Schlagwörter: | Anisotropie , Magnetismus , Rundstrecke | |
| Freie Schlagwörter (Englisch): | self-assembly rolling , 3D racetrack , spin-orbit torque , strain-induced anisotropy , Dzyaloshinskii–Moriya interaction | |
| DDC-Sachgruppe: | Magnetismus | |
| Sprache: | englisch | |
| Tag der mündlichen Prüfung | 28.05.2025 | |
| OA-Lizenz | CC BY 4.0 |
