SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 40: Poster Magnetism II
MA 40.29: Poster
Donnerstag, 30. März 2023, 14:00–16:00, P2/EG
Magneto-ionic control of magnetic properties in perpendicular magnetized synthetic antiferromagnet stacks — •Maria-Andromachi Syskaki1, Takaaki Dohi2,3, Mona Bhukta2, Jürgen Langer1, Mathias Kläui2, and Gerhard Jakob2 — 1Singulus Technologies AG, 63796 Kahl am Main, Germany — 2Institut für Physik, Johannes Gutenberg-Universität Mainz, Staudingerweg 7, 55128 Mainz, Germany — 3Laboratory for Nanoelectronics and Spintronics, Research Institute of Electrical Communication, Tohoku University, Sendai, Japan
Voltage-controlled spintronic devices are the key to a more energy-efficient way for future storage applications [1]. Electric field effect experiments in this direction reported that the application of a low-power ionic liquid gating technique [2] to nearly compensated synthetic antiferromagnet (SAF) stacks gives rise to high domain wall velocities [3]. In our work, we have grown a SAF stack by magnetron sputtering consisting of two ferromagnetic layers coupled by a non-magnetic spacer layer. The coupling strength is modified by tuning the thickness of the spacer layer to investigate the electric field modulation. With room temperature voltage-controlled magneto-ionic effects, we focus on the modulation of the magnetic properties in this system, i.e., the control of the compensation ratio, the perpendicular magnetic anisotropy, and the antiferromagnetic RKKY coupling strength. [1] T. Nozaki et al., Micromachines 10(5), 327 (2019). [2] C. Leighton et al., Nature Mater 18, 13 (2019). [3] Y. Guan et al., Nat. Commun. 12, 5002 (2021).