SKM 2021 – scientific programme

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MA: Fachverband Magnetismus

MA 15: Posters Magnetism IV

MA 15.39: Poster

Thursday, September 30, 2021, 13:30–16:30, P

Magnetostructural phase transition in Fe₆₀V₄₀ alloy thin films — •Md. Shadab Anwar^1,3, H. cansever¹, B. Boehm², R. A. Gallardo⁵, R. Hübner¹, S. Zhou¹, U. Kentsch¹, B. Eggert⁴, H. Wende⁴, K. Potzger¹, J. Faßbender¹, K. Lenz¹, J. Lindner¹, O. Hellwig^1,2, and R. Bali¹ — ¹Helmholtz-Zentrum Dresden-Rossendorf, Germany — ²TU Chemnitz, Germany — ³TU Dresden, Germany — ⁴University of Duisburg-Essen, Germany — ⁵Universidad Técnica Federico Santa María, Chile

Ferromagnetism can be induced in non-ferromagnetic precursors such as B2 Fe₆₀Al₄₀[1] and B2 Fe₅₀Rh₅₀[2] through lattice disordering. Here we study a magnetostructural transition in Fe₆₀V₄₀ thin films using ion-irradiation. We show that the as-grown films possess an M_s of 17 kA/m and irradiation with 25 keV Ne⁺-ions at a fluence of ∼ 5 x 10¹⁵ions/cm² leads to an increase of M_s to ∼ 750 kA/m. A structural short-range order in the as-grown films can be observed, that transforms to A2 phase (bcc) via ion-irradiation. The A2 region appears to nucleate at the film surface, and with increasing Ne⁺-fluence, it propagates deeper into the film. Mössbauer spectroscopy and ferromagnetic resonance have been applied to track the variation of local magnetic ordering and dynamic behaviour respectively.

Financial support by DFG grants BA 5656/1-2 and WE 2623/14-2 is acknowledged.

[1]Ehrler, J.et al., New J. Phys.,22,073004(2020)

[2]Eggert, B.et al., RSC Adv.,10,14386(2020)