SKM 2023 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 9: Cooperative Phenomena: Spin Structures and Magnetic Phase Transitions

MA 9.10: Vortrag

Montag, 27. März 2023, 17:30–17:45, HSZ 401

Local structure of disordered Fe60V40 and the impact on its magnetism — •Simon Rauls¹, Benedikt Eggert¹, Shadab Anwar², Damian Günzing¹, Philipp Klaßen¹, Tom Helbig¹, Rantej Bali², and Heiko Wende¹ — ¹Faculty of Physics and CENIDE, University of Duisburg-Essen — ²Helmholtz-Zentrum Dresden-Rossendorf

Control of the structural order and nearest-neighbour interactions can provide a path to modify application relevant magnetic properties, such as the Gilbert damping. The binary alloy Fe60V40 shows an amorphous to polycrystalline phase transition, which can be triggered by annealing or ion irradiation. This phase transition also is a transition from a paramagnetic phase towards a ferromagnetic phase with very low Gilbert damping of ∼0.002 [1], which makes the material a promising candidate for the fabrication of embedded magnetic nanostructures in a single irradiation step. We want to highlight the results of our structural and magnetic investigations on Fe60V40 thin films, using EXAFS, magnetometry and Mössbauer spectroscopy, in order to understand the interconnection between the evolving ferromagnetism and nearest-neighbour interactions along the ion-irradiation induced phase transition.
We acknowledge financial support from the DFG through project no. 322462997 and DESY for beamtime allocation at beamline P65.

[1] S. Anwar et al. ACS Appl. Electron. Mater. 2022, 4, 8 3860-3869