High-temperature Néel skyrmions in Fe3GaTe2 stabilized by Fe intercalation into the van der Waals gap
Abstract Two-dimensional (2D) van der Waals (vdW) magnets that exhibit ferromagnetism at ambient temperature show great promise for spintronic applications. However, until now, only a few pristine or doped 2D magnets have demonstrated the ability to host non-collinear spin textures, thereby limiting...
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Nature Portfolio
2024-06-01
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| Series: | npj Spintronics |
| Online Access: | https://doi.org/10.1038/s44306-024-00024-5 |
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| author | Rana Saha Holger L. Meyerheim Börge Göbel Ingrid Mertig Stuart S. P. Parkin |
| author_facet | Rana Saha Holger L. Meyerheim Börge Göbel Ingrid Mertig Stuart S. P. Parkin |
| author_sort | Rana Saha |
| collection | DOAJ |
| description | Abstract Two-dimensional (2D) van der Waals (vdW) magnets that exhibit ferromagnetism at ambient temperature show great promise for spintronic applications. However, until now, only a few pristine or doped 2D magnets have demonstrated the ability to host non-collinear spin textures, thereby limiting their potential applications. Here we directly observe Néel-type skyrmions in the metallic vdW magnetic compound Fe3GaTe2 (FGaT) up to temperatures well above room temperature (≈340 K) in the absence of any external magnetic field. We show that the presence of defects in the structure of FGaT make its structure acentric and therefore compatible with hosting skyrmions that would otherwise not be possible. Indeed, in this regard it is very similar to the closely related compound Fe3GeTe2 (FGT), whose structure with the same space group P3m1 is also realized by defects. Interestingly, however, FGaT accommodates a significantly higher concentration of Fe within the vdW gaps, likely accounting for its enhanced Curie temperature (T C). In addition to the Néel skyrmions observed in the temperature range of 250–340 K, we also detect type-I and -II Bloch-type skyrmionic bubbles in the temperature range of 100–200 K due to an enhanced magnitude of dipole-dipole interactions relative to the Dzyaloshinskii-Moriya exchange interaction. Self-intercalation is thus a highly interesting property of vdW magnets that considerably modifies their fundamental properties. |
| format | Article |
| id | doaj-art-5cdec04775424628b0fb75db16857592 |
| institution | DOAJ |
| issn | 2948-2119 |
| language | English |
| publishDate | 2024-06-01 |
| publisher | Nature Portfolio |
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| series | npj Spintronics |
| spelling | doaj-art-5cdec04775424628b0fb75db168575922025-08-20T02:59:18ZengNature Portfolionpj Spintronics2948-21192024-06-01211710.1038/s44306-024-00024-5High-temperature Néel skyrmions in Fe3GaTe2 stabilized by Fe intercalation into the van der Waals gapRana Saha0Holger L. Meyerheim1Börge Göbel2Ingrid Mertig3Stuart S. P. Parkin4Max Planck Institute of Microstructure PhysicsMax Planck Institute of Microstructure PhysicsInstitute of Physics, Martin Luther UniversityInstitute of Physics, Martin Luther UniversityMax Planck Institute of Microstructure PhysicsAbstract Two-dimensional (2D) van der Waals (vdW) magnets that exhibit ferromagnetism at ambient temperature show great promise for spintronic applications. However, until now, only a few pristine or doped 2D magnets have demonstrated the ability to host non-collinear spin textures, thereby limiting their potential applications. Here we directly observe Néel-type skyrmions in the metallic vdW magnetic compound Fe3GaTe2 (FGaT) up to temperatures well above room temperature (≈340 K) in the absence of any external magnetic field. We show that the presence of defects in the structure of FGaT make its structure acentric and therefore compatible with hosting skyrmions that would otherwise not be possible. Indeed, in this regard it is very similar to the closely related compound Fe3GeTe2 (FGT), whose structure with the same space group P3m1 is also realized by defects. Interestingly, however, FGaT accommodates a significantly higher concentration of Fe within the vdW gaps, likely accounting for its enhanced Curie temperature (T C). In addition to the Néel skyrmions observed in the temperature range of 250–340 K, we also detect type-I and -II Bloch-type skyrmionic bubbles in the temperature range of 100–200 K due to an enhanced magnitude of dipole-dipole interactions relative to the Dzyaloshinskii-Moriya exchange interaction. Self-intercalation is thus a highly interesting property of vdW magnets that considerably modifies their fundamental properties.https://doi.org/10.1038/s44306-024-00024-5 |
| spellingShingle | Rana Saha Holger L. Meyerheim Börge Göbel Ingrid Mertig Stuart S. P. Parkin High-temperature Néel skyrmions in Fe3GaTe2 stabilized by Fe intercalation into the van der Waals gap npj Spintronics |
| title | High-temperature Néel skyrmions in Fe3GaTe2 stabilized by Fe intercalation into the van der Waals gap |
| title_full | High-temperature Néel skyrmions in Fe3GaTe2 stabilized by Fe intercalation into the van der Waals gap |
| title_fullStr | High-temperature Néel skyrmions in Fe3GaTe2 stabilized by Fe intercalation into the van der Waals gap |
| title_full_unstemmed | High-temperature Néel skyrmions in Fe3GaTe2 stabilized by Fe intercalation into the van der Waals gap |
| title_short | High-temperature Néel skyrmions in Fe3GaTe2 stabilized by Fe intercalation into the van der Waals gap |
| title_sort | high temperature neel skyrmions in fe3gate2 stabilized by fe intercalation into the van der waals gap |
| url | https://doi.org/10.1038/s44306-024-00024-5 |
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