Lorentz transmission electron microscopy on nanometric magnetic bubbles and skyrmions in bilayered manganites La{sub 1.2}Sr{sub 1.8}(Mn{sub 1−y}Ru{sub y}){sub 2}O{sub 7} with controlled magnetic anisotropy

Journal Article · Mon Nov 23 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4936078· OSTI ID:22486125

Morikawa, D.; Yu, X. Z.; Kaneko, Y. ^[1]; Tokunaga, Y.; Arima, T. ^[1]; Nagai, T.; Kimoto, K. ^[2]; Tokura, Y. ^[1]

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1. RIKEN Center for Emergent Matter Science (CEMS), Wako 351-0198 (Japan)
2. Transmission Electron Microscopy Station and Surface Physics and Structure Unit, National Institute for Materials Science (NIMS), Tsukuba 305-0044 (Japan)

We have investigated nanometric magnetic textures in thin (<150 nm) plates of Ru-doped bilayered manganites La{sub 1.2}Sr{sub 1.8}(Mn{sub 1−y}Ru{sub y}){sub 2}O{sub 7}. Ru substitution for Mn site changes the magnetic anisotropy from in-plane to out-of-plane easy axis type without any significant change of global magnetic and crystal structures. The combination of conventional and Lorentz transmission electron microscopy observations confirms the emergence of magnetic bubbles and skyrmions in the absence of magnetic field. With the changing Ru concentration, systematic changes in the type of magnetic bubbles are observed. A tiny residual magnetic field also affects the generation and the type-change of magnetic bubbles.

• OSTI ID: 22486125
• Journal Information: Applied Physics Letters, Vol. 107, Issue 21; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ANISOTROPY
BUBBLES
CRYSTAL STRUCTURE
DOPED MATERIALS
LAYERS
MAGNETIC FIELDS
NANOSTRUCTURES
SKYRME POTENTIAL
SOLITONS
TRANSMISSION ELECTRON MICROSCOPY