TY - JOUR
T1 - A new reversal mode in exchange coupled antiferromagnetic/ferromagnetic disks: Distorted viscous vortex
AU - Gilbert, Dustin A.
AU - Ye, Li
AU - Varea, Aïda
AU - Agramunt-Puig, Sebastià
AU - Del Valle, Nuria
AU - Navau, Carles
AU - López-Barbera, José Francisco
AU - Buchanan, Kristen S.
AU - Hoffmann, Axel
AU - Sánchez, Alvar
AU - Sort, Jordi
AU - Liu, Kai
AU - Nogués, Josep
PY - 2015/1/1
Y1 - 2015/1/1
N2 - © The Royal Society of Chemistry. Magnetic vortices have generated intense interest in recent years due to their unique reversal mechanisms, fascinating topological properties, and exciting potential applications. In addition, the exchange coupling of magnetic vortices to antiferromagnets has also been shown to lead to a range of novel phenomena and functionalities. Here we report a new magnetization reversal mode of magnetic vortices in exchange coupled Ir20Mn80/Fe20Ni80 microdots: distorted viscous vortex reversal. In contrast to the previously known or proposed reversal modes, the vortex is distorted close to the interface and viscously dragged due to the uncompensated spins of a thin antiferromagnet, which leads to unexpected asymmetries in the annihilation and nucleation fields. These results provide a deeper understanding of the physics of exchange coupled vortices and may also have important implications for applications involving exchange coupled nanostructures.
AB - © The Royal Society of Chemistry. Magnetic vortices have generated intense interest in recent years due to their unique reversal mechanisms, fascinating topological properties, and exciting potential applications. In addition, the exchange coupling of magnetic vortices to antiferromagnets has also been shown to lead to a range of novel phenomena and functionalities. Here we report a new magnetization reversal mode of magnetic vortices in exchange coupled Ir20Mn80/Fe20Ni80 microdots: distorted viscous vortex reversal. In contrast to the previously known or proposed reversal modes, the vortex is distorted close to the interface and viscously dragged due to the uncompensated spins of a thin antiferromagnet, which leads to unexpected asymmetries in the annihilation and nucleation fields. These results provide a deeper understanding of the physics of exchange coupled vortices and may also have important implications for applications involving exchange coupled nanostructures.
U2 - https://doi.org/10.1039/c5nr01856k
DO - https://doi.org/10.1039/c5nr01856k
M3 - Article
VL - 7
SP - 9878
EP - 9885
JO - Nanoscale
JF - Nanoscale
SN - 2040-3364
IS - 21
ER -