2025/12/01 by Emanuele Longo, Longo, Emanuele, G. Gubbiotti +11
Engineering · Physics and Astronomy · #FOS: Physical sciences #Magnetic properties of thin films #Materials Science (cond-mat.mtrl-sci) #Metallic Glasses and Amorphous Alloys #Theoretical and Computational Physics
paper · pdf · doi:10.48550/arxiv.2512.01724
openalex publication_date 2025/12/01 · openalex created_date 2025/12/03 · openalex updated_date 2026/07/30
Recent results show remarkable interfacial--Dzyaloshinskii--Moriya interaction (i-DMI) in magnetic heterostructures composed of relatively thick Fe thin films (≫ 1 nm). To investigate its origin, we present a thorough magnetic characterization of the SiO2/57Fe(t)/Au and SiO2/Pt/57Fe(t)/Au heterostructures (t = 1.6 - 2.2 nm). An i-DMI constant of DsPt = 0.43 \mathrmmJ m-2 is extracted for the Pt/Fe/Au system, as probed by wavevector-resolved Brillouin light scattering spectroscopy. Ferromagnetic resonance and conversion electron Mössbauer spectroscopy indicate that significant surface anisotropy is present in Pt/Fe/Au, and that an interfacial Fe fraction (∼18) exhibits tilted magnetization (∼25^∘ out of plane) and an enhanced hyperfine field, correlating with the stronger i-DMI.