Regensburg 2022 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 4: Disordered Magnetic Materials

MA 4.3: Vortrag

Montag, 5. September 2022, 10:00–10:15, H47

Magnetostructural phase transition in Fe₆₀V₄₀ alloy thin films — •Md Shadab Anwar^1,2, Hamza cansever¹, Benny Boehm³, Rudolfo Gallardo⁵, René Hübner¹, Shengqiang Zhou¹, Ulrich Kentsch¹, Benedikt Eggert⁴, Simon Rauls⁴, Heiko Wende⁴, Kay Potzger¹, Jürgen Faßbender¹, Kilian Lenz¹, Jürgen Lindner¹, Olav Hellwig^1,3, and Rantej Bali¹ — ¹HZDR, Germany — ²TU Dresden, Germany — ³TU Chemnitz, Germany — ⁴UDE Duisburg, Germany — ⁵UTF Santa María, Chile

Ferromagnetism can be induced in non-ferromagnetic alloys 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 is observed in the as-grown films that transforms to A2 phase via ion-irradiation. 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)