| Title: | Oscillating topological charge for skyrmion-based spin-transfer torque nano-oscillator |
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| Authors: | ID Sršan, Vinko, Institut "Jožef Stefan" (Author)
ID Komelj, Matej, Institut "Jožef Stefan" (Author)
ID Šturm, Sašo, Institut "Jožef Stefan" (Author) |
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| Files: |  URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S0304885326003628?via%3Dihub
 PDF - Presentation file, download (2,52 MB)
MD5: C7054D995E2F9391AD3D25522439866C
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IJS - Jožef Stefan Institute
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| Abstract: | 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. |
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| Keywords: | magnetic skyrmions, skyrmion strings, micromagnetics, spin torque nano-oscillator |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 05.11.2025 |
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| Article acceptance date: | 27.04.2026 |
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| Publication date: | 18.05.2026 |
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| Publisher: | Elsevier |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 1-7 |
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| Numbering: | Vol. 654, [article no.] 174171 |
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| Source: | Nizozemska |
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| PID: | 20.500.12556/DiRROS-29576  |
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| UDC: | 537 |
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| ISSN on article: | 1873-4766 |
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| DOI: | 10.1016/j.jmmm.2026.174171 |
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| COBISS.SI-ID: | 279666435 |
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| Copyright: | © 2026 The Author(s). |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 28. 5. 2026;
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| Publication date in DiRROS: | 28.05.2026 |
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| Views: | 83 |
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| Downloads: | 70 |
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