Dresden 2017 – wissenschaftliches Programm
MA 37.9: Vortrag
Mittwoch, 22. März 2017, 11:45–12:00, HSZ 401
Programmable magnetization configurations in Co-antidot lattices of optimized geometry — Tobias Schneider1,2, Manuel Langer1,3, Julia Alekhina1,4, Ewa Kowalska1,3, Antje Oelschlägel1,3, Anna Semisalova1,4, Andreas Neudert1, Kilian Lenz1, Mikhail P. Kostylev5, Jürgen Fassbender1,3, Adekunle O. Adeyeye6, Jürgen Lindner1, and •Rantej Bali1 — 1Helmholtz-Zentrum Dresden - Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany — 2Technische Universität Chemnitz, Germany — 3Technische Universität Dresden, Germany — 4Lomonosov Moscow State University, Russia — 5University of Western Australia, Australia — 6National University of Singapore, Singapore
Programmable stable magnetization configurations are of great interest for the emerging fields of spintronics and magnonics. Such devices might act as spinwave filters or spinwave logics. Here, we present a micromagnetic study of the reversal process in Cobalt antidot lattices. To achieve stable magnetization configurations we optimized the thickness and the inter-antidot distance, resulting in ≈ 50 nm and respectively ≈ 150 nm . The magnetization reversal in these antidots occurs via field driven transition between 3 elementary magnetization states - termed G, C and Q . These magnetization states can be described by vectors, and the reversal process proceeds via step-wise linear operations on these vector states. The reversal processes predicted by micromagnetic simulations were confirmed by experimental observations.