Chirality-induced asymmetric magnetic nucleation in Pt/Co/AlOx ultrathin microstructures
| Autor: | Pizzini, Stefania, Vogel, Jan, Rohart, Stanislas, Buda, Liliana-Daniela, Jué, E., Boulle, Olivier, Miron, Ioan Mihai, Safeer, C. K., Auffret, Stéphane, Gaudin, Gilles, Thiaville, André |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Physical Review Letters 113 (2014) 047203 |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.113.047203 |
| Popis: | The nucleation of reversed magnetic domains in Pt/Co/AlO$_{x}$ microstructures with perpendicular anisotropy was studied experimentally in the presence of an in-plane magnetic field. For large enough in-plane field, nucleation was observed preferentially at an edge of the sample normal to this field. The position at which nucleation takes place was observed to depend in a chiral way on the initial magnetization and applied field directions. An explanation of these results is proposed, based on the existence of a sizable Dzyaloshinskii-Moriya interaction in this sample. Another consequence of this interaction is that the energy of domain walls can become negative for in-plane fields smaller than the effective anisotropy field. Comment: Published version, Physical Review Letters 113, 047203 (2014) |
| Databáze: | arXiv |
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