Formation and rotation of skyrmion crystal in the chiral-lattice insulator Cu 2 OSeO 3
By Shinichiro Seki, J. Kim, D. Inosov, R. Georgii, B. Keimer, S. Ishiwata, Y. Tokura. 2012
134 citations recorded by the source corpus.
Small-angle neutron scattering experiments were performed on a bulk single crystal of chiral-lattice multiferroic insulator Cu${}_{2}$OSeO${}_{3}$. In the absence of an external magnetic field, helical spin order with magnetic modulation vector $q\ensuremath{\parallel}\ensuremath{\langle}001\ensuremath{\rangle}$ was identified. When a magnetic field is applied, a triple-$q$ magnetic structure emerges normal to the field in the A phase just below the magnetic ordering temperature ${T}_{c}$, which suggests the formation of a triangular lattice of skyrmions. Notably, the favorable $q$ direction in the A phase changes from $q\ensuremath{\parallel}\ensuremath{\langle}110\ensuremath{\rangle}$ to $q\ensuremath{\parallel}\ensuremath{\langle}001\ensuremath{\rangle}$ upon approaching ${T}_{c}$. Near the phase boundary between these two states, the external magnetic field induces a 30${}^{\ensuremath{\circ}}$ rotation of the skyrmion lattice. This suggests a delicate balance between the magnetic anisotropy and the spin texture near ${T}_{c}$, such that even a small perturbation significantly affects the ordering pattern of the skyrmions.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/03db3d055f96d839e9386d2dd25b9f20d72b3e4d
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Atomic and Molecular Physics, and Optics
In Condensed Matter Physics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- Skyrmion-electronics: writing, deleting, reading and processing magnetic skyrmions toward spintronic applications (2019, background): “In 2012, Seki and colleagues [109] for the first time identified skyrmions in an insulating multiferroic magnet Cu2OSeO3 through LTEM and magnetic susceptibility measurements below the temperature of 60 K (see figure 3(d)).”