Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 37: Micro- and Nanostructured Magnetic Materials

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 Schneider^1,2, Manuel Langer^1,3, Julia Alekhina^1,4, Ewa Kowalska^1,3, Antje Oelschlägel^1,3, Anna Semisalova^1,4, Andreas Neudert¹, Kilian Lenz¹, Mikhail P. Kostylev⁵, Jürgen Fassbender^1,3, 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.