Local Inversion Symmetry Breaking and Thermodynamic Evidence for Ferrimagnetism in Fe3GaTe2
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912511634178048 |
|---|---|
| author | Lee, Sang-Eon Li, Yue Lee, Yeonkyu Brown, W. Kice Cai, PeiYu Yun, Jinyoung Lee, Chanyoung Moon, Alex Mei, Lingrui Kim, Jaeyong Xin, Yan Borchers, Julie A. Heitmann, Thomas W. Frontzek, Matthias Ratcliff, William D. McCandless, Gregory T. Chan, Julia Y. Santos, Elton J. G. Kim, Jeehoon Phatak, Charudatta M. Kulichenko, Vadym Balicas, Luis |
| author_facet | Lee, Sang-Eon Li, Yue Lee, Yeonkyu Brown, W. Kice Cai, PeiYu Yun, Jinyoung Lee, Chanyoung Moon, Alex Mei, Lingrui Kim, Jaeyong Xin, Yan Borchers, Julie A. Heitmann, Thomas W. Frontzek, Matthias Ratcliff, William D. McCandless, Gregory T. Chan, Julia Y. Santos, Elton J. G. Kim, Jeehoon Phatak, Charudatta M. Kulichenko, Vadym Balicas, Luis |
| contents | The layered compound Fe3GaTe2 is attracting attention due to its high Curie temperature, low dimensionality, and the presence of topological spin textures above room temperature, making Fe$_3$GaTe$_2$ a good candidate for applications in spintronics. Here, we show, through transmission electron microscopy (TEM) techniques, that Fe$_3$GaTe$_2$ single crystals break local inversion symmetry while maintaining global inversion symmetry according to X-ray diffraction. Coupled to the observation of Néel skyrmions via Lorentz-TEM, our structural analysis provides a convincing explanation for their presence in centrosymmetric materials. Magnetization measurements as a function of the temperature displays a sharp first-order thermodynamic phase-transition leading to a reduction in the magnetic moment. This implies that the ground state of Fe$_3$GaTe$_2$ is globally ferrimagnetic and not a glassy magnetic state composed of ferrimagnetic, and ferromagnetic domains as previously claimed. Neutron diffraction studies indicate that the ferromagnetic to ferrimagnetic transition upon reducing the external magnetic field is associated with a change in the magnetic configuration/coupling between Fe1 and Fe2 moments. We observe a clear correlation between the hysteresis observed in both the skyrmion density and the magnetization of Fe$_3$GaTe$_2$. This indicates that its topological spin textures are affected by the development of ferrimagnetism upon cooling. Observation, via magnetic force microscopy, of magnetic bubbles at the magnetic phase boundary suggests skyrmions stabilized by the competition among magnetic phases and distinct exchange interactions. Our study provides an explanation for the observation of Néel skyrmions in centrosymmetric systems, while exposing a correlation between the distinct magnetic phases of Fe$_3$GaTe$_2$ and topological spin textures. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_23068 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Local Inversion Symmetry Breaking and Thermodynamic Evidence for Ferrimagnetism in Fe3GaTe2 Lee, Sang-Eon Li, Yue Lee, Yeonkyu Brown, W. Kice Cai, PeiYu Yun, Jinyoung Lee, Chanyoung Moon, Alex Mei, Lingrui Kim, Jaeyong Xin, Yan Borchers, Julie A. Heitmann, Thomas W. Frontzek, Matthias Ratcliff, William D. McCandless, Gregory T. Chan, Julia Y. Santos, Elton J. G. Kim, Jeehoon Phatak, Charudatta M. Kulichenko, Vadym Balicas, Luis Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons The layered compound Fe3GaTe2 is attracting attention due to its high Curie temperature, low dimensionality, and the presence of topological spin textures above room temperature, making Fe$_3$GaTe$_2$ a good candidate for applications in spintronics. Here, we show, through transmission electron microscopy (TEM) techniques, that Fe$_3$GaTe$_2$ single crystals break local inversion symmetry while maintaining global inversion symmetry according to X-ray diffraction. Coupled to the observation of Néel skyrmions via Lorentz-TEM, our structural analysis provides a convincing explanation for their presence in centrosymmetric materials. Magnetization measurements as a function of the temperature displays a sharp first-order thermodynamic phase-transition leading to a reduction in the magnetic moment. This implies that the ground state of Fe$_3$GaTe$_2$ is globally ferrimagnetic and not a glassy magnetic state composed of ferrimagnetic, and ferromagnetic domains as previously claimed. Neutron diffraction studies indicate that the ferromagnetic to ferrimagnetic transition upon reducing the external magnetic field is associated with a change in the magnetic configuration/coupling between Fe1 and Fe2 moments. We observe a clear correlation between the hysteresis observed in both the skyrmion density and the magnetization of Fe$_3$GaTe$_2$. This indicates that its topological spin textures are affected by the development of ferrimagnetism upon cooling. Observation, via magnetic force microscopy, of magnetic bubbles at the magnetic phase boundary suggests skyrmions stabilized by the competition among magnetic phases and distinct exchange interactions. Our study provides an explanation for the observation of Néel skyrmions in centrosymmetric systems, while exposing a correlation between the distinct magnetic phases of Fe$_3$GaTe$_2$ and topological spin textures. |
| title | Local Inversion Symmetry Breaking and Thermodynamic Evidence for Ferrimagnetism in Fe3GaTe2 |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2507.23068 |