تقرير
Fast domain walls governed by \OE rsted fields in cylindrical magnetic nanowires
| العنوان: | Fast domain walls governed by \OE rsted fields in cylindrical magnetic nanowires |
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| المؤلفون: | Schöbitz, M., De Riz, A., Martin, S., Bochmann, S., Thirion, C., Vogel, J., Foerster, M., Aballe, L., Menteş, T. O., Locatelli, A., Genuzio, F., Denmat, S. Le, Cagnon, L., Toussaint, J. C., Gusakova, D., Bachmann, J., Fruchart, O. |
| المصدر: | Phys. Rev. Lett. 123, 217201 (2019) |
| سنة النشر: | 2019 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Mesoscale and Nanoscale Physics |
| الوصف: | Since its proposal, the idea to vastly increase data storage density with a magnetic non-volatile 3D shift-register has sustained interest in current-induced domain wall (DW) motion. So far, experimental efforts have focused on flat nanostrips, which exhibit a wide range of noteworthy effects, yet suffer from intrinsic DW instabilities limiting their mobility. In contrast, ferromagnetic cylindrical nanowires (NWs) can host a novel type of magnetic DW, namely the Bloch-point wall (BPW), which due to its specific 3D topology should not experience the same fundamental issue. This could give rise to DW velocities over ~1000 m/s and fascinating new physics including coupling to magnetic spin waves, however, experimental evidence of DW dynamics in NWs is lacking until now. Here we report experimental results on current-induced DW motion in NWs with velocities >600 m/s, quantitatively consistent with predictions. Furthermore, our results indicate that although previously disregarded, the OErsted field induced by the current plays instead a crucial and valuable role in stabilising exclusively BPWs. Comment: 6 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevLett.125.249901 |
| URL الوصول: | http://arxiv.org/abs/1903.08377 |
| رقم الأكسشن: | edsarx.1903.08377 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevLett.125.249901 |
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