Observation of Colossal Topological Hall Effect in Noncoplanar Ferromagnet Cr5Te6 Thin Films

被引:24
作者
Chen, Yequan [1 ,2 ]
Zhu, Yingmei [3 ]
Lin, Renju [4 ]
Niu, Wei [1 ,5 ]
Liu, Ruxin [1 ]
Zhuang, Wenzhuo [1 ]
Zhang, Xu [1 ]
Liang, Jinghua [3 ]
Sun, Wenxuan [1 ]
Chen, Zhongqiang [1 ]
Hu, Yongsheng [2 ]
Song, Fengqi [2 ]
Zhou, Jian [6 ]
Wu, Di [2 ]
Ge, Binghui [4 ]
Yang, Hongxin [2 ,3 ]
Zhang, Rong [1 ,7 ]
Wang, Xuefeng [1 ]
机构
[1] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Sch Elect Sci & Engn, Jiangsu Prov Key Lab Adv Photon & Elect Mat, Nanjing 210093, Peoples R China
[2] Nanjing Univ, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[3] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China
[4] Anhui Univ, Inst Phys Sci & Informat Technol, Informat Mat & Intelligent Sensing Lab Anhui Prov, Hefei 230601, Peoples R China
[5] Nanjing Univ Posts & Telecommun, Sch Sci, Nanjing 210023, Peoples R China
[6] Nanjing Univ, Dept Mat Sci & Engn, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China
[7] Xiamen Univ, Dept Phys, Xiamen 316005, Peoples R China
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
chiral spin textures; Cr5Te6 thin films; Dzyaloshinskii-Moriya interaction; noncoplanar ferromagnet; topological Hall effect; ROOM-TEMPERATURE; INTRINSIC FERROMAGNETISM; ANOMALOUS HALL; SKYRMION; INSULATOR; SURFACES; CR3TE4; CRTE;
D O I
10.1002/adfm.202302984
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The topological Hall effect (THE) is critical to the exploration of the spin chirality generated by the real-space Berry curvature, which has attracted worldwide attention for its prospective applications in spintronic devices. However, the prominent THE remains elusive at room temperature, which severely restricts the practical integration of chiral spin textures. Here, a colossal intrinsic THE is showed up to approximate to 1.6 mu omega cm in large-area ferromagnet Cr5Te6 thin films epitaxially grown by pulsed laser deposition. Such a THE can be maintained until 270 K, which is attributed to the field-stimulated noncoplanar spin textures induced by the interaction of the in-plane ferromagnet and antiferromagnet infrastructures. The first-principles calculations further verify the considerable Dzyaloshinskii-Moriya interaction in Cr5Te6. This work not only paves the way for robust chiral spin textures near room temperature in large-area low-dimensional ferromagnetic films for practical applications, but also facilitates the development of high-density and dissipationless spintronic devices.
引用
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页数:9
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