Direct observation of attractive skyrmions and skyrmion clusters in the cubic helimagnet Cu2OSeO3
| Autor: | Alexei N. Bogdanov, James Loudon, Andrey O. Leonov, M. Ciomaga Hatnean, Geetha Balakrishnan |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Condensed matter physics Skyrmion Direct observation 02 engineering and technology Type (model theory) Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 021001 nanoscience & nanotechnology 01 natural sciences 3. Good health Ferromagnetism Phase (matter) 0103 physical sciences 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review B. 97 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.97.134403 |
| Popis: | We report the discovery of attractive magnetic skyrmions and their clusters in noncentrosymmetric ferromagnets. These three-dimensional solitons have been predicted to exist in the cone phase of chiral ferromagnets [J. Phys: Condens. Matter 28, 35LT01 (2016)] and are fundamentally different from the more common repulsive axisymmetric skyrmions that occur in the magnetically saturated state. We present real-space images of these skyrmion clusters in thin ($\ensuremath{\sim}70$ nm) single-crystal samples of ${\mathrm{Cu}}_{2}{\mathrm{OSeO}}_{3}$ taken using transmission electron microscopy and develop a phenomenological theory describing this type of skyrmion. |
| Databáze: | OpenAIRE |
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