Large unconventional anomalous Hall effect far above room temperature in epitaxial Fe$_3$Ga$_4$ films
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , , , , , , , , , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2025
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866913949337780224 |
|---|---|
| author | Meng, Jing Yang, Huali Shen, Yu Zheng, Kun Wang, Hongru Wang, Yuhao Xia, Keqi Yu, Bocheng Zhu, Xiaoyan Lv, Baiqing Huang, Yaobo Ma, Jie Gawryluk, Dariusz Jakub Shiroka, Toni Yang, Zhenzhong Xu, Yang Zhan, Qingfeng Shang, Tian |
| author_facet | Meng, Jing Yang, Huali Shen, Yu Zheng, Kun Wang, Hongru Wang, Yuhao Xia, Keqi Yu, Bocheng Zhu, Xiaoyan Lv, Baiqing Huang, Yaobo Ma, Jie Gawryluk, Dariusz Jakub Shiroka, Toni Yang, Zhenzhong Xu, Yang Zhan, Qingfeng Shang, Tian |
| contents | Noncoplanar spin textures usually exhibit a finite scalar spin chirality (SSC) that can generate effective magnetic fields and lead to additional contributions to the Hall effect, namely topological or unconventional anomalous Hall effect (UAHE). Unlike topological spin textures (e.g., magnetic skyrmions), materials that exhibit fluctuation-driven SSC and UAHE are rare. So far, their realization has been limited to either low temperatures or high magnetic fields, both of which are unfavorable for practical applications. Identifying new materials that exhibit UAHE in a low magnetic field at room temperature is therefore essential. Here, we report the discovery of a large UAHE far above room temperature in epitaxial Fe$_3$Ga$_4$ films, where the fluctuation-driven SSC stems from the field-induced transverse-conical-spiral phase. Considering their epitaxial nature and the large UAHE stabilized at room temperature in a low magnetic field, Fe$_3$Ga$_4$ films represent an exciting, albeit rare, case of a promising candidate material for spintronic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_07434 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Large unconventional anomalous Hall effect far above room temperature in epitaxial Fe$_3$Ga$_4$ films Meng, Jing Yang, Huali Shen, Yu Zheng, Kun Wang, Hongru Wang, Yuhao Xia, Keqi Yu, Bocheng Zhu, Xiaoyan Lv, Baiqing Huang, Yaobo Ma, Jie Gawryluk, Dariusz Jakub Shiroka, Toni Yang, Zhenzhong Xu, Yang Zhan, Qingfeng Shang, Tian Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons Noncoplanar spin textures usually exhibit a finite scalar spin chirality (SSC) that can generate effective magnetic fields and lead to additional contributions to the Hall effect, namely topological or unconventional anomalous Hall effect (UAHE). Unlike topological spin textures (e.g., magnetic skyrmions), materials that exhibit fluctuation-driven SSC and UAHE are rare. So far, their realization has been limited to either low temperatures or high magnetic fields, both of which are unfavorable for practical applications. Identifying new materials that exhibit UAHE in a low magnetic field at room temperature is therefore essential. Here, we report the discovery of a large UAHE far above room temperature in epitaxial Fe$_3$Ga$_4$ films, where the fluctuation-driven SSC stems from the field-induced transverse-conical-spiral phase. Considering their epitaxial nature and the large UAHE stabilized at room temperature in a low magnetic field, Fe$_3$Ga$_4$ films represent an exciting, albeit rare, case of a promising candidate material for spintronic devices. |
| title | Large unconventional anomalous Hall effect far above room temperature in epitaxial Fe$_3$Ga$_4$ films |
| topic | Materials Science Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2507.07434 |