Dresden 2026 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 57: Thin Films: Magnetic Coupling Phenomena / Exchange Bias and Magnetic Anisotropy

MA 57.3: Vortrag

Freitag, 13. März 2026, 10:00–10:15, POT/0112

Perpendicular magnetic anisotropy in Pt/Co/Cu heterostructures — •Anastasios Markou¹ and Ioannis Panagiotopoulos² — ¹Physics Department, University of Ioannina, 45110 Ioannina, Greece — ²Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina,Greece

Magnetic multilayers with perpendicular magnetic anisotropy (PMA) formed by interfacing ferromagnetic layers with heavy-metal spin-orbit-coupled layers have received significant attention due to their tunable magnetic interactions and potential for stabilizing room-temperature topological magnetic textures. Inserting a 3d metal, such as Cu, at the interface between the ferromagnet and the heavy metal can break the symmetry of the adjacent interfaces and give rise to non-compensated asymmetric interactions, enhancing the chiral character of the system [1].

Here, we report on the magnetic properties of magnetron sputtered [Pt/Co/Cu]₇ multilayers with optimized deposition parameters to achieve high-quality interfaces and tunable PMA. We show that the magnetic properties can be tuned by varying the thickness of the 3d elements. PMA is observed over a broad range of Co and Cu thicknesses, demonstrating the crucial role of the Pt/Co interface, while the adjacent Cu layer provides an additional degree of freedom to tailor the effective interfacial anisotropy and magnetic coupling. These interfacial contributions are found to govern key properties such as coercivity, loop squareness, and the overall magnetization reversal behavior.

[1] H. Jia et al, Phys. Rev. Mater. 4, 024405 (2020).

Keywords: perpendicular magnetic anisotropy; magnetic multilayers; 3d/5d interfaces; magnetization reversal