Dresden 2026 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 55: Skyrmions III
MA 55.4: Vortrag
Freitag, 13. März 2026, 10:15–10:30, HSZ/0004
Magnetoresistance and Planar Hall Effect in Noncollinear Magnets — •Juba Bouaziz1,2, Hiroshi Ishida3, Hiroshi Katsumoto1, and Stefan Blügel1,4 — 1Peter Grünberg Institut, Forschungszentrum Jülich, 52425 Jülich — 2Faculty of Physics, University of Duisburg-Essen, 47057 Duisburg — 3College of Humanities and Sciences, Nihon University, Tokyo — 4Institute for Theoretical Physics, RWTH Aachen University, 52062 Aachen
Magnetotransport measurements are widely used to probe magnetic structures. We study how noncollinear magnetism modifies magnetoresistance (MR) and the planar Hall effect (PHE). In the weak-coupling limit, and using a multiple-scattering expansion of the electron current for Rashba-mediated conduction electrons [1], we show that noncollinearity introduces additional contributions to both MR and PHE. These arise from tilted magnetic moments and include a chiral MR term determined by the chirality of the magnetic structure. We also identify a noncollinear magnetoresistance (NCMR) contribution that persists even without Rashba spin-orbit interaction. Finally, we analyze the form and magnitude of these effects for different nanostructures, including magnetic trimers and topological spin textures such as skyrmions.
[1] J. Bouaziz et al., Phys. Rev. Lett. 126, 147203 (2021).
Keywords: Mangneto-resistance; Planar Hall effect; Non-collinear magnetism