Air-stable ultrathin Cr3Te4 nanosheets with thickness-dependent magnetic biskyrmions

被引：77

作者：

Li, Bailing ^{[1
,2
]}

Deng, Xia ^{[3
,4
]}

Shu, Weining ^{[5
]}

Cheng, Xing ^{[6
]}

Qian, Qi ^{[7
]}

Wan, Zhong ^{[7
]}

Zhao, Bei ^{[1
]}

Shen, Xiaohua ^{[1
]}

Wu, Ruixia ^{[1
]}

Shi, Shun ^{[2
]}

Zhang, Hongmei ^{[1
]}

Zhang, Zucheng ^{[1
]}

Yang, Xiangdong ^{[1
]}

Zhang, Junwei ^{[3
,4
]}

Zhong, Mianzeng ^{[8
]}

Xia, Qinglin ^{[8
]}

Li, Jia ^{[1
]}

Liu, Yuan ^{[9
]}

Liao, Lei ^{[2
]}

Ye, Yu ^{[6
]}

Dai, Lun ^{[6
]}

Peng, Yong ^{[3
,4
]}

Li, Bo ^{[2
,10
]}

Duan, Xidong ^{[1
]}

机构：

[1] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Hunan Key Lab Two Dimens Mat, Changsha 410082, Hunan, Peoples R China

[2] Hunan Univ, Coll Integrated Circuits, Sch Phys & Elect, Coll Semicond, Changsha 410082, Hunan, Peoples R China

[3] Lanzhou Univ, Sch Mat & Energy, Electron Microscopy Ctr, Lanzhou 730000, Peoples R China

[4] Lanzhou Univ, Key Lab Magnetism & Magnet Mat, Minist Educ, Lanzhou 730000, Peoples R China

[5] Zhongxing Telecom Equipment, Wuhan 518057, Peoples R China

[6] Peking Univ, Sch Phys, State Key Lab Artificial Microstruct & Mesoscop P, Beijing 102213, Peoples R China

[7] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

[8] Cent South Univ, Sch Phys & Elect, Changsha 410083, Peoples R China

[9] Hunan Univ, Sch Phys & Elect, Changsha 410082, Hunan, Peoples R China

[10] Hunan Univ, Shenzhen Res Inst, Shenzhen 518063, Peoples R China

来源：

MATERIALS TODAY | 2022年 / 57卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Two-dimension materials; Ferromagnetic metal; Topological Hall effect; Biskyrmions; REAL-SPACE OBSERVATION; 2-DIMENSIONAL FERROMAGNETISM; ROOM-TEMPERATURE; SKYRMIONS; TRANSITION; SPIN; STABILITY; 1T-CRTE2; MOTION;

D O I：

10.1016/j.mattod.2022.04.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two-dimensional (2D) materials with intrinsic magnetism have drawn intense interest for fundamental research and potential application in spintronics and valleytronics. Here we synthesized 2D Cr3Te4 nanosheets with controllable thickness by chemical vapor deposition approach. Reflection magnetic circular dichroism and magneto-transport measurements demonstrated that the Cr(3)Te(4 )nanosheets feature excellent environmental stability and have a thickness-dependent ferromagnetic behavior with a high Curie temperature of 165-235 K. Lorentz transmission electron microscopy studies revealed topologically nontrivial magnetic-spin states in the ultrathin Cr3Te4 nanosheets. The magnetic stripe domains in Cr3Te4 can transform into biskyrmion bubbles when an external magnetic field is applied perpendicularly to the nanosheet. The size and density of the biskyrmions can be tuned by the external applied magnetic field and thickness of the nanosheets, respectively. Our findings of topologically nontrivial magnetic-spin states in air-stable 2D magnets could promise new designs of magnetic memory storage, sensors, and spintronics.

引用

页码：66 / 74

页数：9

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