SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 5: Thin Films: Magnetic Coupling Phenomena / Exchange Bias
MA 5.2: Vortrag
Montag, 27. März 2023, 09:45–10:00, POT 6
Ferromagnetic springs in exchange biased trilayers — •Sapida Akhundzada1, Lukas Paetzold1, Arne Vereijken1, Christian Janzen1, Thomas Saerbeck2, and Arno Ehresmann1 — 1Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Kassel, Germany — 2Institut Laue-Langevin, Grenoble, France
Exchange springs or magnetic helices, consisting of multilayered thin film systems, exhibit spiral spin configurations during magnetization reversal [1]. By combining magnetically soft/hard bilayers [2] or exchanged biased ferromagnetic/antiferromagnetic layer systems [3], comparably short domain walls can be engineered, making these systems interesting for fundamental as well as applied research [1]. Here we show how magnetic order can be induced in exchange biased trilayer systems consisting of a single ferromagnetic layer embedded between two antiferromagnetic layers. The exchange coupling between the ferromagnet and one antiferromagnet is modified by light helium ion bombardment [4] leading to a trilayer system in which the exchange bias at the two ferromagnet/antiferromagnet interfaces points in different directions. The trilayer system is characterized by angular-resolved vibrating sample magnetometry revealing the existence of the spiral domain state in the designed layer system.
[1] A.C. Basaran, et al., MRS Bull. 40, 925 (2015).
[2] F. Magnus, et al., Nat. Commun. 7, (2016).
[3] A. Scholl, et al., Phys. Rev. Lett. 92, 18 (2004).
[4] T. Mewes, et al., Appl. Phys. Lett. 76, 1057 (2000).