Short-Period Skyrmion Crystals in Itinerant Body-Centered Tetragonal Magnets
In this study, we investigate the stability of a magnetic skyrmion crystal with short-period magnetic modulations in a centrosymmetric body-centered tetragonal system. By performing the simulated annealing for the spin model, incorporating the effects of the biquadratic interaction and high-harmonic...
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MDPI AG
2024-10-01
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| Series: | Magnetochemistry |
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| author | Satoru Hayami |
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| author_sort | Satoru Hayami |
| collection | DOAJ |
| description | In this study, we investigate the stability of a magnetic skyrmion crystal with short-period magnetic modulations in a centrosymmetric body-centered tetragonal system. By performing the simulated annealing for the spin model, incorporating the effects of the biquadratic interaction and high-harmonic wave–vector interaction in momentum space, we find that the double-<i>Q</i> square skyrmion crystal consisting of two spin density waves is stabilized in an external magnetic field. We also show that double-<i>Q</i> states appear in both low- and high-field regions; the low-field spin configuration is characterized by an anisotropic double-<i>Q</i> modulation consisting of a superposition of the spiral wave and sinusoidal wave, while the high-field spin configuration is characterized by an isotropic double-<i>Q</i> modulation consisting of a superposition of two sinusoidal waves. Furthermore, we show that the obtained multiple-<i>Q</i> instabilities can be realized for various ordering wave vectors. The results provide the possibility of realizing the short-period skyrmion crystals under the body-centered tetragonal lattice structure. |
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| institution | OA Journals |
| issn | 2312-7481 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
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| series | Magnetochemistry |
| spelling | doaj-art-af4e726440fd42fc961bd35f3edf23a72025-08-20T02:10:56ZengMDPI AGMagnetochemistry2312-74812024-10-0110107810.3390/magnetochemistry10100078Short-Period Skyrmion Crystals in Itinerant Body-Centered Tetragonal MagnetsSatoru Hayami0Graduate School of Science, Hokkaido University, Sapporo 060-0810, JapanIn this study, we investigate the stability of a magnetic skyrmion crystal with short-period magnetic modulations in a centrosymmetric body-centered tetragonal system. By performing the simulated annealing for the spin model, incorporating the effects of the biquadratic interaction and high-harmonic wave–vector interaction in momentum space, we find that the double-<i>Q</i> square skyrmion crystal consisting of two spin density waves is stabilized in an external magnetic field. We also show that double-<i>Q</i> states appear in both low- and high-field regions; the low-field spin configuration is characterized by an anisotropic double-<i>Q</i> modulation consisting of a superposition of the spiral wave and sinusoidal wave, while the high-field spin configuration is characterized by an isotropic double-<i>Q</i> modulation consisting of a superposition of two sinusoidal waves. Furthermore, we show that the obtained multiple-<i>Q</i> instabilities can be realized for various ordering wave vectors. The results provide the possibility of realizing the short-period skyrmion crystals under the body-centered tetragonal lattice structure.https://www.mdpi.com/2312-7481/10/10/78magnetic skyrmionbody-centered tetragonal latticebiquadratic interactionmultiple-Q stateitinerant electronhigh-harmonic wave–vector interaction |
| spellingShingle | Satoru Hayami Short-Period Skyrmion Crystals in Itinerant Body-Centered Tetragonal Magnets Magnetochemistry magnetic skyrmion body-centered tetragonal lattice biquadratic interaction multiple-Q state itinerant electron high-harmonic wave–vector interaction |
| title | Short-Period Skyrmion Crystals in Itinerant Body-Centered Tetragonal Magnets |
| title_full | Short-Period Skyrmion Crystals in Itinerant Body-Centered Tetragonal Magnets |
| title_fullStr | Short-Period Skyrmion Crystals in Itinerant Body-Centered Tetragonal Magnets |
| title_full_unstemmed | Short-Period Skyrmion Crystals in Itinerant Body-Centered Tetragonal Magnets |
| title_short | Short-Period Skyrmion Crystals in Itinerant Body-Centered Tetragonal Magnets |
| title_sort | short period skyrmion crystals in itinerant body centered tetragonal magnets |
| topic | magnetic skyrmion body-centered tetragonal lattice biquadratic interaction multiple-Q state itinerant electron high-harmonic wave–vector interaction |
| url | https://www.mdpi.com/2312-7481/10/10/78 |
| work_keys_str_mv | AT satoruhayami shortperiodskyrmioncrystalsinitinerantbodycenteredtetragonalmagnets |