Two-dimensional characterization of three-dimensional magnetic bubbles in Fe${}_3$Sn${}_2$ nanostructures

Abstract

We report differential phase contrast scanning transmission electron microscopy (TEM) of nanoscale magnetic objects in Kagome ferromagnet Fe${}_3$Sn${}_2$ nanostructures. This technique can directly detect the deflection angle of a focused electron beam, thus allowing clear identification of the real magnetic structures of two magnetic objects including three-ring and complex arch-shaped vortices in Fe${}_3$Sn${}_2$ by Lorentz transmission electron microscopy imaging. Numerical calculations based on real material-specific parameters well reproduced the experimental results, showing that the magnetic objects can be attributed to integral magnetizations of two types of complex three-dimensional (3D) magnetic skyrmion bubbles with depth-modulated spin twisting. Magnetic configurations obtained using the high-resolution TEM are generally considered as two-dimensional (2D) magnetic objects previously. Our results imply the importance of the integral magnetizations of underestimated 3D magnetic structures in 2D TEM magnetic characterizations.

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Cited by in corpus (18)

• Qubits based on merons in magnetic nanodisks
• Current-Controlled Topological Magnetic Transformations in a Nanostructured Kagome Magnet
• Stable skyrmion bundles at room temperature and zero magnetic field in a chiral magnet
• Combined Magnetic Imaging and Anisotropic Magnetoresistance Detection of Dipolar Skyrmions
• Sewing skyrmion and antiskyrmion by quadrupole of Bloch points
• Skyrmion-Bubble Bundles in an X-type Sr2Co2Fe28O46 Hexaferrite above Room Temperature
• Observation of Hybrid Magnetic Skyrmion Bubbles in Fe3Sn2 Nanodisks
• Current-Controlled Skyrmion Number in Confined Ferromagnetic Nanostripes
• Phonon anomalies associated with spin reorientation in the Kagome ferromagnet Fe3Sn2
• Thermal Stability of Skyrmion Tubes in Nanostructured Cuboids
• Creating and Deleting a Single Dipolar Skyrmion by Surface Spin Twists
• Skyrmion Sliding Switch in a 90-nm-Wide Nanostructured Chiral Magnet
• Current-driven Dynamics of Skyrmion Bubbles in Achiral Uniaxial Magnets
• Current-controlled creations, deletions, and topological transformations of a single magnetic antiskyrmion in nanostructured cells
• Deterministic Electrical Control of Single Magnetic Bubbles in Nanostructured Cells
• Enhanced Curie temperature and room-temperature 50-nm skyrmions achieved in hexagonal ferromagnet Mn5Ge3+x synthesized via a high-pressure method
• Ferrimagnetic Skyrmions in a Tetragonal Mn1.9Co0.1Sb Single Crystal at Room Temperature
• Fresnel Magnetic Imaging of Ultrasmall Skyrmion Lattices