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Title: A new reversal mode in exchange coupled antiferromagnetic/ferromagnetic disks: distorted viscous vortex
Author: Gilbert, Dustin A.
Ye, Li
Varea Espelt, Aïda
Agramunt Puig, Sebastià
Valle, Núria del
Navau Ros, Carles
López Barberá, José Francisco
Buchanan, Kristen S.
Hoffmann, Axel
Sánchez Moreno, Álvaro
Sort, Jordi
Liu, Kai
Nogués, Josep
Keywords: Imants
Discos magnètics
Magnetic disks
Issue Date: 28-Apr-2015
Publisher: Royal Society of Chemistry
Abstract: Magnetic vortices have generated intense interest in recent years due to their unique reversal mecha-nisms, fascinating topological properties, and exciting potential applications. In addition, the exchangecoupling of magnetic vortices to antiferromagnets has also been shown to lead to a range of novelphenomena and functionalities. Here we report a new magnetization reversal mode of magnetic vorticesin exchange coupled Ir20Mn80/Fe20Ni80microdots: distorted viscous vortex reversal. In contrast to thepreviously known or proposed reversal modes, the vortex is distorted close to the interface and viscouslydragged due to the uncompensated spins of a thin antiferromagnet, which leads to unexpected asymme-tries in the annihilation and nucleationfields. These results provide a deeper understanding of the physicsof exchange coupled vortices and may also have important implications for applications involvingexchange coupled nanostructures
Note: Reproducció del document publicat a:
It is part of: Nanoscale, 2015, vol. 7, p. 9878-9885
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ISSN: 2040-3364
Appears in Collections:Articles publicats en revistes (Institut de Nanociència i Nanotecnologia (IN2UB))
Articles publicats en revistes (Enginyeria Electrònica i Biomèdica)

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