Journal
NANO LETTERS
Volume 23, Issue 8, Pages 3532-3539Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.3c00693
Keywords
ferromagnetic perovskite manganites; canted magnetic anisotropy; Dzyaloshinskii-Moriya interaction; magnetic force microscopy; Lorentz transmission electron microscopy
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Ferromagnetic La0.7Sr0.3Mn1-xRuxO3 epitaxial multilayers with controlled variation of the Ru/Mn content were synthesized to investigate the possibility of generating a Dzyaloshinskii-Moriya interaction. Magnetic stripe domains separated by Neel-type domain walls and small Neel skyrmions were observed using magnetic force microscopy and Lorentz transmission electron microscopy. These findings are consistent with micromagnetic modeling, suggesting the existence of a sizable Dzyaloshinskii-Moriya interaction arising from inversion symmetry breaking and strain effects.
Ferromagnetic La0.7Sr0.3Mn1-xRuxO3 epitaxial multilayers with controlled variation of the Ru/Mn content were synthesized to engineer canted magnetic anisotropy and variable exchange interactions, and to explore the possibility of generating a Dzyaloshinskii-Moriya interaction. The ultimate aim of the multilayer design is to provide the conditions for the formation of domains with nontrivial magnetic topology in an oxide thin film system. Employing magnetic force microscopy and Lorentz transmission electron microscopy in varying perpendicular magnetic fields, magnetic stripe domains separated by Neel-type domain walls as well as Neel skyrmions smaller than 100 nm in diameter were observed. These findings are consistent with micromagnetic modeling, taking into account a sizable Dzyaloshinskii-Moriya interaction arising from the inversion symmetry breaking and possibly from strain effects in the multilayer system.
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