20.500.12556/DiRROS-29576 Oscillating topological charge for skyrmion-based spin-transfer torque nano-oscillator Magnetic skyrmions are considered as promising candidates for next generation information carriers. In cubic chiral magnets with bulk Dzyaloshinskii–Moriya interaction, skyrmions trivially extend into the third dimension forming so-called skyrmion string. The third dimension of skyrmion strings introduces an additional degree of freedom that can be utilized in skyrmion-based applications. An example of such application is spin-torque oscillator based on skyrmion breathing, gyrotropic motion and skyrmion deformation mechanisms. Expanding these mechanisms, we propose design of spin-torque oscillator based on topological charge oscillation in confined geometry where skyrmion string breathing, gyrotropic motion and skyrmion-edge interactions are coupled. Micromagnetic calculations were employed to demonstrate topological charge oscillation as a function of model geometries. It is shown that only a small subset of material geometries is suitable to obtain topological charge oscillations, indicating that precise engineering of geometry would be required to realize such a device. Findings presented in this work contribute to a better understanding of a skyrmion string dynamical phenomena, which offer additional route in designing spin-torque oscillators. magnetic skyrmions skyrmion strings micromagnetics spin torque nano-oscillator magnetni skirmioni true false true Elsevier Nizozemska Angleški jezik Slovenski jezik © 2026 The Author(s). Neznano 2026-05-28 12:22:07 2026-05-28 12:22:08 2026-05-29 03:56:22 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Opis vira z dne 28. 5. 2026; str. 1-7 Vol. 654, [article no.] 174171 Sep. 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2025-11-05 2026-04-27 2026-05-18 537 1873-4766 10.1016/j.jmmm.2026.174171 279666435 https://www.sciencedirect.com/science/article/pii/S0304885326003628?via%3Dihub 1 1629c905-5a7f-11f1-8e51-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=44381 RAZ_Srsan_Vinko_2026.pdf RAZ_Srsan_Vinko_2026.pdf 1 C7054D995E2F9391AD3D25522439866C 9290d5a059cbf5ffe64137f571fccbacd2aae1ae942818e36dd354ce11931d21 7bb90449-5a7f-11f1-8e51-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=44382 Institut Jožef Stefan 0 0 0