Distorted triangular skyrmion lattice in a noncentrosymmetric tetragonal magnet
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arXiv
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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866909448154382336 |
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| author | Matsumura, Takeshi Kurauchi, Kenshin Tsukagoshi, Mitsuru Higa, Nonoka Nakao, Hironori Kakihana, Masashi Hedo, Masato Nakama, Takao Ōnuki, Yoshichika |
| author_facet | Matsumura, Takeshi Kurauchi, Kenshin Tsukagoshi, Mitsuru Higa, Nonoka Nakao, Hironori Kakihana, Masashi Hedo, Masato Nakama, Takao Ōnuki, Yoshichika |
| contents | Magnetic skyrmions are particle-like spin-swirling objects ubiquitously realized in magnets. They are topologically stable chiral kinks composed of multiple modulation waves of spiral spin structures, where the helicity of each spiral is usually selected by antisymmetric exchange interactions in noncentrosymmetric crystals. We report an experimental observation of a distorted triangular lattice of skyrmions in the polar tetragonal magnet EuNiGe$_3$, reflecting a strong coupling with the lattice. Moreover, through resonant x-ray diffraction, we find that the magnetic helicity of the original spiral at zero field is reversed when the skyrmion lattice is formed in a magnetic field. This means that the energy gain provided by the skyrmion lattice formation is larger than the antisymmetric exchange interaction. Our findings will lead us to a further understanding of emergent magnetic states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_14767 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Distorted triangular skyrmion lattice in a noncentrosymmetric tetragonal magnet Matsumura, Takeshi Kurauchi, Kenshin Tsukagoshi, Mitsuru Higa, Nonoka Nakao, Hironori Kakihana, Masashi Hedo, Masato Nakama, Takao Ōnuki, Yoshichika Strongly Correlated Electrons Magnetic skyrmions are particle-like spin-swirling objects ubiquitously realized in magnets. They are topologically stable chiral kinks composed of multiple modulation waves of spiral spin structures, where the helicity of each spiral is usually selected by antisymmetric exchange interactions in noncentrosymmetric crystals. We report an experimental observation of a distorted triangular lattice of skyrmions in the polar tetragonal magnet EuNiGe$_3$, reflecting a strong coupling with the lattice. Moreover, through resonant x-ray diffraction, we find that the magnetic helicity of the original spiral at zero field is reversed when the skyrmion lattice is formed in a magnetic field. This means that the energy gain provided by the skyrmion lattice formation is larger than the antisymmetric exchange interaction. Our findings will lead us to a further understanding of emergent magnetic states. |
| title | Distorted triangular skyrmion lattice in a noncentrosymmetric tetragonal magnet |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2306.14767 |