SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 17: Thin Films: Magnetic Anisotropy
MA 17.2: Vortrag
Dienstag, 28. März 2023, 09:45–10:00, POT 6
Control of magnetoelastic coupling in Ni/Fe multilayers using He+ ion irradiation — •Giovanni Masciocchi1,2, Gyan van der Jagt3,4, Maria-Andromachi Syskaki2,5, Alessio Lamperti6, Niklas Wolff7, Andriy Lotnyk8, Jurgen Langer5, Lorenz Kienle7, Gerhard Jakob2, Benjamin Borie3, Andreas Kehlberger1, Dafine Ravelosona3, and Mathias Kläui2 — 1Sensitec GmbH, Mainz, Germany — 2Johannes Gutenberg University Mainz, Mainz, Germany — 3Spin-Ion Technologies, Palaiseau, France — 4Universite Paris-Saclay, Gif-sur-Yvette, France — 5Singulus Technologies AG, Kahl am Main, Germany — 6CNR-IMM, Agrate Brianza, Italy — 7Kiel University, Kiel, Germany — 8Institute of Surface Engineering , Leipzig , Germany
The requirements for the magnetoelastic coefficient in thin films are often demanding. For example, magnetic sensors mostly require strain immunity, while actuators require giant strain effects. One way to obtain the desired value of the saturation magnetostriction, is to use the combination of two or more materials with different magnetic and magnetoelastic properties in a multilayer fashion. However, the material choice alone, does not allow for a local control of the magnetostriction. In this study [1], we investigate the effects of He+ irradiation on the magneto-elastic properties of a Ni/Fe multi-layered stack. The progressive intermixing caused by He+ irradiation at the interfaces of the multilayer, allows us to locally change the magnetoelastic coupling sign with increasing He+ fluences.
[1] Masciocchi, et al. Appl. Phys. Lett. 121.18 182401, 2022