Anomalous exchange bias effect in ferromagnetic VI₃ flakes

Zhang, Xi1,2,3; Xia, Xiuquan3; Liu, Qiye4; He, Yonggang4; Wang, Le3,5; Lin, Junhao4; Mei, Jia-Wei4,6; Cheng, Yingchun7,8; Dai, Jun-Feng3,5,9

2024-03-25

10.1063/5.0194900

APPLIED PHYSICS LETTERS   影响因子和分区

0003-6951

1077-3118

The exchange bias effect, pivotal in magnetic data storage and sensing devices, has been observed not only in interfacial regions but also in intrinsic ferromagnetic materials. Here, we have uncovered a robust and stable exchange bias effect within the layered van der Waals (vdW) ferromagnet VI3 employing magnetic circular dichroism microscopy. At 10 K, we observed a significant exchange field of approximately 0.1 T, accompanied by random shifts (positive or negative relative to zero magnetic field) after zero-field cooling. Notably, this effect is effectively controllable after field cooling, with shift direction opposing the applied magnetic field. The presence of strong magnetic anisotropic energy within VI3 results in larger coercivity-bound magnetic domains. These domains dictate the neighboring ferromagnetic alignment and induce shifts in the hysteresis loop. Our study not only contributes to comprehending fundamental nanoscale magnetic interactions but also sheds light on emergent phenomena within layered van der Waals magnets.

SCI

英语

NI期刊

通讯

National Natural Science Foundation of China10.13039/501100001809[11974159] ; National Natural Science Foundation of China[2024A1515012679]

Physics

Physics, Applied

WOS:001190268300022

AIP Publishing

PHYSICS

Web of Science

1.Northwestern Polytech Univ, Xian Inst Flexible Elect IFE, Frontiers Sci Ctr Flexible Elect FSCFE, Xian 710072, Peoples R China
2.Northwestern Polytech Univ, Xian Inst Biomed Mat & Engn IBME, Xian 710072, Peoples R China
3.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
5.Int Quantum Acad, Shenzhen 518048, Peoples R China
6.Southern Univ Sci & Technol, Shenzhen Key Lab Adv Quantum Funct Mat & Devices, Shenzhen 518055, Peoples R China
7.Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat, Key Lab Flexible Elect, Nanjing 211816, Peoples R China
8.Nanjing Tech Univ, Inst Adv Mat, Jiangsu Natl Synerget Innovat Ctr Adv Mat, Nanjing 211816, Peoples R China
9.Shenzhen Key Lab Quantum Sci & Engn, Shenzhen 518055, Peoples R China

Zhang, Xi,Xia, Xiuquan,Liu, Qiye,et al. Anomalous exchange bias effect in ferromagnetic VI₃ flakes[J]. APPLIED PHYSICS LETTERS,2024,124(13).

Zhang, Xi.,Xia, Xiuquan.,Liu, Qiye.,He, Yonggang.,Wang, Le.,...&Dai, Jun-Feng.(2024).Anomalous exchange bias effect in ferromagnetic VI₃ flakes.APPLIED PHYSICS LETTERS,124(13).

Zhang, Xi,et al."Anomalous exchange bias effect in ferromagnetic VI₃ flakes".APPLIED PHYSICS LETTERS 124.13(2024).