Workshop 2025: Curvilinear Magnetism: Fundamentals, Applications and Perspectives

Session Information

Location: Lecture room Schay
Day: Wednesday, 14 May
Time: 14:00 - 14:30
Chairperson: Markus Garst

Presentation Details

Presentation Type: Oral presentation (livestream)
Title: Curvilinear Magnetism: Fundamentals, Applications and Perspectives
Abstract: The onrush of nanotechnologies extended conventional flat architectures to curved space, showcasing the fundamental importance of the mutual interplay between geometry, topology and the order parameter. In the case of magnetism a mutual interplay of magnetization texture (material properties), curvature, and topology (geometrical properties) becomes a playground for curvilinear magnetism [1]. By tailoring curvature and topology of the conventional magnetic materials there appears a possibility to control material response leading to modification or even launching new functionalities [2]. This is granted by complementary expertise and advances of fundamental researched, materials sciences and technologies.

This talk focuses on the peculiarities emerging from geometrically curved magnetic objects, including 3D bent and twisted curved wires and films. The curvilinear geometry manifests itself in emergent interactions. These geometry-governed interactions can be local driven by exchange and stemming from local curvature and torsion or stemming from the varying cross-section, but also can be nonlocal driven by magnetostatics and supported by topology [3]. As a consequence, family of novel geometry-governed effects emerge, which include magnetochiral effects and topological patterning, resulting in theoretically predicted domain wall automotion, unlimited domain wall velocities, chirality symmetry breaking, mesoscale DMI etc. Current and future challenges of the curvilinear magnetism will be discussed [4].

References
[1] Makarov D and Sheka D, Curvilinear Micromagnetism: From Fundamentals to Applications (2022), Springer (doi: 10.1007/978-3-031-09086-8)
[2] Sheka D D, Curvilinear magnetism, Encyclopedia of Materials, 2023 (doi: 10.1016/B978-0-12-819728-8.00069-3)
[3] Sheka D D et al, Comm.Phys., 2020 (doi: 10.1038/s42005-020-0387-2); Yershov K V and Sheka D D, PRB, 2023 (doi: 10.1103/PhysRevB.107.L100415); Volkov O M et al, Nature Commun, 2023 (doi: 10.1038/s41467-023-37081-z)
[4] Sheka D D, APL, 2021 (doi: 10.1063/5.0048891); Gubbiotti G et al, JAP, 2025 (doi : 10.1088/1361-648X/ad9655)

Presenter

Prof Denis Sheka
Taras Shevchenko National University of Kyiv | Ukraine

Authors

1. Sheka, Denis D. | Department of Nanophysics of Condensed Media, Educational Scientific Institute of High Technologies, Taras Shevchenko National University of Kyiv, 64/13 Volodymyrska str., 01601 Kyiv, Ukraine