Formation of the triangular skyrmion-lattice is found in a tetragonal polar magnet VOSe2O5. By magnetization and small-angle neutron scattering measurements on the single crystals, we identify a cycloidal spin state at zero field and a N\'eel-type skyrmion-lattice phase under a magnetic field along the polar axis. Adjacent to this phase, another magnetic phase of an incommensurate spin texture is identified at lower temperatures, tentatively assigned to a square skyrmion-lattice phase. These findings exemplify the versatile features of N\'eel-type skyrmions in bulk materials, and provide a unique occasion to explore the physics of topological spin textures in polar magnets.
@article{arxiv.1710.04000,
title = {N\'eel-type skyrmion lattice in tetragonal polar magnet VOSe$_2$O$_5$},
author = {Takashi Kurumaji and Taro Nakajima and Victor Ukleev and Artem Feoktystov and Taka-hisa Arima and Kazuhisa Kakurai and Yoshinori Tokura},
journal= {arXiv preprint arXiv:1710.04000},
year = {2017}
}
Comments
11 pages, 4 figures, supplemental material (7 pages)