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Pré-Publication, Document De Travail (Preprint/Prepublication) Année : 2024

Temperature dependence and capping and underlayer layers effect on the interfacial magnetic properties of Ir/Fe-or Pt/Fe-based systems

Résumé

Brillouin light scattering and microstrip line ferromagnetic resonance were used to investigate the perpendicular magnetic anisotropy (PMA), the magnetic damping and the interfacial Dzyaloshinskii-Moriya interaction (iDMI) in X/Fe(t_Fe)/Y thin films of variable thickness (1.4 nm≤tFe≤10 nm), where X=Pt, Ir or Cu and Y=Ir, Cu or MgO. A particular interest is given to their temperature dependence. A method was devised to accurately determine the individual contribution of each interface with Fe to the effective interface PMA constant. This involved combination of the direct measurement of the thickness dependences of effective magnetization and frequency mismatch. We observed an asymmetrical Ir/Fe and Fe/Ir as well as Cu/Fe and Fe/Cu interfaces: Fe/Ir contributes strongly in PMA and spin pumping induced damping. The damping constant dependence on the inverse effective thickness of Fe revealed a nonlinear behavior, attributed to the interfacial two magnon scattering, found to be strong in Cu/Fe/Ir and Cu/Fe/Cu. iDMI measurements revealed an opposite chirality of Pt/Fe and Ir/Fe interfaces. These magnetic interfacial properties were studied as a function of temperature in the Pt/Fe/Cu and Cu/Fe/Cu systems. We showed that the interface PMA constant increases linearly with temperature, while iDMI constant decreases significantly, in absolute value, by approximately 60%. This behaviou is most probably due to thermal disorder, suggesting a greater sensitivity of iDMI to temperature. Measurements post-temperature indicated that the temperature triggers interdiffusion and affects the magnetic properties. However, it is difficult to dissociate them due to the absence of in-situ VSM measurements.
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Dates et versions

hal-04592450 , version 1 (29-05-2024)

Identifiants

  • HAL Id : hal-04592450 , version 1

Citer

Djoudi Ourdani, N Challab, Yves Roussigné, Salim Mourad Chérif, Mihai Sebastian Gabor, et al.. Temperature dependence and capping and underlayer layers effect on the interfacial magnetic properties of Ir/Fe-or Pt/Fe-based systems. 2024. ⟨hal-04592450⟩
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