Vortex Dynamics in Ferromagnetic Nanoelements Observed by Micro-Hall Probes |
| T. Ščepka, J. Šoltýs, M. Precner, J. Fedor, J. Tóbik, D. Gregušová, F. Gucmann, R. Kúdela, V. Cambel
Institute of Electrical Engineering, Slovak Academy of Sciences, 841 04 Bratislava, Slovakia |
| Full Text PDF |
| In this work we measure the nucleation and annihilation of magnetic vortices in Pacman-like (PL) micromagnets prepared from Permalloy (Ni81Fe19, Py) at 77 K. Lateral dimensions of explored objects are ≤1 μm with thickness of about 40 nm. The micromagnets are located directly on the high-sensitive micro-Hall probe based on GaAs/AlGaAs heterostructure by lift-off process. Experiments show good agreement of the magnetization reversal with the micromagnetic simulation. Other shapes of micromagnets are also considered to obtain more precise picture of the vortex dynamics. |
DOI: 10.12693/APhysPolA.126.390 PACS numbers: 81.16.Nd, 75.60.Jk, 74.25.Ha |