Skyrmion
Skyrmion
Skyrmion is a vortex-like magnetic structure formed by the magnetic moments of electron spins. The term “Skymion” is named after Skyrme, a theoretical physicist of UK, who proposed the quantum structure. “Skymion” is also called “magnetic vortex” or “spin vortex”. Its size ranges from approximately several nm to 100 nm, depending on materials and chemical compositions. Skymions align like a two-dimensional crystal by cooling the specimen temperature and controlling the external magnetic field.
Skyrmion was first observed as a real-space image by Lorentz electron microscopy. Since then, it was also imaged by STEM using the DPC (differential phase contrast) method.
Courtesy of figures:
Senior Researcher T. Matsumoto and Associate Professor N. Shibata
The University of Tokyo (as of August 2015)
Fig. (a) Schematic of the magnetic structure of skyrmions in a thin film. The directions of the magnetic moments of electron spins are indicated by arrows. The directions of those magnetic moments are perpendicular to the film plane at the core of the respective skyrmions, but swirl in the film plane at the peripheral region.
Fig. (b) A real-space image of skymions acquired by the DPC (differential phase contrast) method (specimen: an Iron alloy). The colors in the figure depict the directions and magnitudes of the magnetic vectors in a two-dimensional plane.
Skyrmion was first observed as a real-space image by Lorentz electron microscopy. Since then, it was also imaged by STEM using the DPC (differential phase contrast) method.
Courtesy of figures:
Senior Researcher T. Matsumoto and Associate Professor N. Shibata
The University of Tokyo (as of August 2015)
Fig. (a) Schematic of the magnetic structure of skyrmions in a thin film. The directions of the magnetic moments of electron spins are indicated by arrows. The directions of those magnetic moments are perpendicular to the film plane at the core of the respective skyrmions, but swirl in the film plane at the peripheral region.
Fig. (b) A real-space image of skymions acquired by the DPC (differential phase contrast) method (specimen: an Iron alloy). The colors in the figure depict the directions and magnitudes of the magnetic vectors in a two-dimensional plane.
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