Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 47: Magnetic anisotropy in thin films
MA 47.5: Vortrag
Donnerstag, 4. April 2019, 12:30–12:45, H53
Total thickness dependence of the magnetic properties of ferromagnetic/non-magnetic thick multilayers — •L. Fallarino1, A. Oelschlägel1, J. A. Arregi2, A. Bashkatov3, S. Stienen1, J. Lindner1, R. Gallardo4, K. Lenz1, B. Böhm5, F. Samad5, K. Chesnel6, and O. Hellwig1,5 — 1HZDR, Germany — 2CEITEC BUT, Czech Republic — 3HZDR, Germany — 4USM, Chile — 5TU Chemnitz, Germany — 6BYU, USA
We present a study of the magnetic properties of [Co(3.0nm)/NM(0.6nm)]N multilayers as a function of Co/NM bilayer repetitions N (NM = Pt, Au and Cu). Magnetometry reveals that samples with high N exhibit two characteristic magnetization reversal mechanisms as a function of the applied magnetic field angle, giving rise to two different morphologies of the remanent domain pattern, either perpendicular stripe or maze-like domains. Furthermore, a detailed study of the influence of the magnetic history allows the determination of both N-range and magnetic field strengths, where a quasi-hexagonal lattice of bubble domains with remarkably high density is stabilized [1]. These modulations of the ferromagnetic order parameter are found to strongly depend on N, in terms of center-to-center bubble distance as well as of bubble diameter. Moreover, such Co/NM multilayers could be utilized to engineer field reconfigurable bubble domain lattices, which resemble magnonic crystals where tuning of the band-gap is enabled by the specific magnetic field history and material parameters [2].[1] K. Chesnel et al., accepted in Phys. Rev. B (25/10/2018) [2] L. Fallarino et al., submitted to Phys. Rev. B (13/10/2018).