Noncentrosymmetric Nowotny Chimney Ladder Ferromagnet Cr4Ge7 with a High Curie Temperature of ~ 207 K
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866914898468929536 |
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| author | Yu, Zhenhai Zhou, Kaijuan Hou, Xiaofei Chen, Xuejiao Tao, Zhen Ye, Yunguan Xia, Wei Li, Zhongyang Zhao, Jinggeng Wu, Wei Liu, Ziyi Wang, Xia Yu, Na Cheng, Jinguang Luo, Jianlin Zhang, Qiang Pomjakushin, Vladimir Zhong, Zhicheng Rui, Soh Jian Lu, Xingye Guo, Yanfeng |
| author_facet | Yu, Zhenhai Zhou, Kaijuan Hou, Xiaofei Chen, Xuejiao Tao, Zhen Ye, Yunguan Xia, Wei Li, Zhongyang Zhao, Jinggeng Wu, Wei Liu, Ziyi Wang, Xia Yu, Na Cheng, Jinguang Luo, Jianlin Zhang, Qiang Pomjakushin, Vladimir Zhong, Zhicheng Rui, Soh Jian Lu, Xingye Guo, Yanfeng |
| contents | Noncentrosymmetric magnets usually host intriguing magnetic interactions inherent the crystal structure with broken inversion symmetry, which can give rise to rich magnetic behaviors. We report herein the high-pressure synthesis, crystal structure, magnetizations and magnetic structure of a so-called Nowotny chimney ladder compound Cr4Ge7. Our analysis on the powder neutron diffraction data revises the crystal structure as a noncentrosymmetric space group (P-4c2, No.116). It exhibits two magnetic orders within the temperature range of 2 - 400 K. The first order at ~ 207 K associated with a small magnetic moment of ~ 0.75 miuB is assigned to a commensurate ferromagnetic structure with a propagation vector k = (0, 0, 0). The weak itinerant ferromagnet nature should be caused by the complex Cr spin orders from different Wyckoff positions. The second order at ~ 18 K is assumed to arise from a competition between the Dzyaloshinskii-Moria and Heisenberg interactions. The results provide an excellent platform for study on intricate interactions between various magnetic exchanges as well as for the exploration of high temperature exotic magnetic properties which host potential applications in next-generation spintronics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_01399 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Noncentrosymmetric Nowotny Chimney Ladder Ferromagnet Cr4Ge7 with a High Curie Temperature of ~ 207 K Yu, Zhenhai Zhou, Kaijuan Hou, Xiaofei Chen, Xuejiao Tao, Zhen Ye, Yunguan Xia, Wei Li, Zhongyang Zhao, Jinggeng Wu, Wei Liu, Ziyi Wang, Xia Yu, Na Cheng, Jinguang Luo, Jianlin Zhang, Qiang Pomjakushin, Vladimir Zhong, Zhicheng Rui, Soh Jian Lu, Xingye Guo, Yanfeng Strongly Correlated Electrons Materials Science Noncentrosymmetric magnets usually host intriguing magnetic interactions inherent the crystal structure with broken inversion symmetry, which can give rise to rich magnetic behaviors. We report herein the high-pressure synthesis, crystal structure, magnetizations and magnetic structure of a so-called Nowotny chimney ladder compound Cr4Ge7. Our analysis on the powder neutron diffraction data revises the crystal structure as a noncentrosymmetric space group (P-4c2, No.116). It exhibits two magnetic orders within the temperature range of 2 - 400 K. The first order at ~ 207 K associated with a small magnetic moment of ~ 0.75 miuB is assigned to a commensurate ferromagnetic structure with a propagation vector k = (0, 0, 0). The weak itinerant ferromagnet nature should be caused by the complex Cr spin orders from different Wyckoff positions. The second order at ~ 18 K is assumed to arise from a competition between the Dzyaloshinskii-Moria and Heisenberg interactions. The results provide an excellent platform for study on intricate interactions between various magnetic exchanges as well as for the exploration of high temperature exotic magnetic properties which host potential applications in next-generation spintronics. |
| title | Noncentrosymmetric Nowotny Chimney Ladder Ferromagnet Cr4Ge7 with a High Curie Temperature of ~ 207 K |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2403.01399 |