Direct visualization of the impurity occupancy roadmap in Ni-substituted van der Waals ferromagnet Fe3GaTe2
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866916243160694784 |
|---|---|
| author | Yuan, Jian Wang, Haonan Hou, Xiaofei Zhang, Binshuo Wei, Yurui Guo, Jiangteng Sun, Lu Yu, Zhenhai Li, Zhikai Liu, Xiangqi Xia, Wei Wang, Xia Liu, Xuerong Chen, Yulin Zhang, Shihao Fu, Xuewen Qu, Ke Yang, Zhenzhong Guo, Yanfeng |
| author_facet | Yuan, Jian Wang, Haonan Hou, Xiaofei Zhang, Binshuo Wei, Yurui Guo, Jiangteng Sun, Lu Yu, Zhenhai Li, Zhikai Liu, Xiangqi Xia, Wei Wang, Xia Liu, Xuerong Chen, Yulin Zhang, Shihao Fu, Xuewen Qu, Ke Yang, Zhenzhong Guo, Yanfeng |
| contents | Impurity substitution is a general strategy to study the intrinsic properties of a quantum material. However, when the target element has more than one Wyckoff position in the lattice, it is a big challenge but with extreme necessity to know the exact position and order of the occupancy of impurity atoms. Via comprehensive experimental and theoretical investigations, we establish herein the roadmap for Ni substitution in Fe3GaTe2, a van der Waals ferromagnet with the Curie temperature TC even reaching ~ 380 K. The results unambiguously reveal that in (Fe1-xNix)3GaTe2, Ni atoms initially form an van der Waals interlayer gap Ni3 sites when x < 0.1, and then gradually occupy the Fe2 sites. After replacing the Fe2 sites at x of ~ 0.75, they start to substitute for the Fe1 sites and eventually realize a full occupation at x = 1.0. Accordingly, TC and saturation magnetic moments of (Fe1-xNix)3GaTe2 both show nonlinear decrease, which is tightly tied to the Ni occupancy order as well as the different roles of Ni3, Fe1 and Fe2 sites in the spin Hamiltonian. The results not only yield fruitful insights into the essential roles of different Fe sites in producing the above room temperature high TC, but also set a paradigm for future impurity substitution study on other quantum materials. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_07156 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Direct visualization of the impurity occupancy roadmap in Ni-substituted van der Waals ferromagnet Fe3GaTe2 Yuan, Jian Wang, Haonan Hou, Xiaofei Zhang, Binshuo Wei, Yurui Guo, Jiangteng Sun, Lu Yu, Zhenhai Li, Zhikai Liu, Xiangqi Xia, Wei Wang, Xia Liu, Xuerong Chen, Yulin Zhang, Shihao Fu, Xuewen Qu, Ke Yang, Zhenzhong Guo, Yanfeng Strongly Correlated Electrons Impurity substitution is a general strategy to study the intrinsic properties of a quantum material. However, when the target element has more than one Wyckoff position in the lattice, it is a big challenge but with extreme necessity to know the exact position and order of the occupancy of impurity atoms. Via comprehensive experimental and theoretical investigations, we establish herein the roadmap for Ni substitution in Fe3GaTe2, a van der Waals ferromagnet with the Curie temperature TC even reaching ~ 380 K. The results unambiguously reveal that in (Fe1-xNix)3GaTe2, Ni atoms initially form an van der Waals interlayer gap Ni3 sites when x < 0.1, and then gradually occupy the Fe2 sites. After replacing the Fe2 sites at x of ~ 0.75, they start to substitute for the Fe1 sites and eventually realize a full occupation at x = 1.0. Accordingly, TC and saturation magnetic moments of (Fe1-xNix)3GaTe2 both show nonlinear decrease, which is tightly tied to the Ni occupancy order as well as the different roles of Ni3, Fe1 and Fe2 sites in the spin Hamiltonian. The results not only yield fruitful insights into the essential roles of different Fe sites in producing the above room temperature high TC, but also set a paradigm for future impurity substitution study on other quantum materials. |
| title | Direct visualization of the impurity occupancy roadmap in Ni-substituted van der Waals ferromagnet Fe3GaTe2 |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2405.07156 |