Tuning the Exchange Bias Effect in 2D van der Waals Ferro-/Antiferromagnetic Fe3GeTe2/CrOCl Heterostructures

Zhang，Tianle1; Zhang，Yujun2; Huang，Mingyuan2; Li，Bo3; Sun，Yinghui4; Qu，Zhe5; Duan，Xidong6; Jiang，Chengbao1; Yang，Shengxue1

2022

10.1002/advs.202105483

Advanced Science   影响因子和分区

2198-3844

The exchange bias effect is extremely expected in 2D van der Waals (vdW) ferromagnetic (FM)/antiferromagnetic (AFM) heterostructures due to the high-quality interface. CrOCl possesses strong magnetic anisotropy at 2D limit, and is an ideal antiferromagnet for constructing FM/AFM heterostructures to explore the exchange bias effect. Here, the exchange bias effect in FeGeTe (FGT)/CrOCl heterostructures through both anomalous Hall effect (AHE) and reflective magnetic circular dichroism (RMCD) measurements is studied. In the AHE measurements, the exchange bias field (H) at 3 K exhibits a distinct increase from ≈150 Oe to ≈450 Oe after air exposure, and such variation is attributed to the formation of an oxidized layer in FGT by analyzing the cross-sectional microstructure. The H is successfully tuned by changing the FGT/CrOCl thickness and the cooling field. Furthermore, a larger H of ≈750 Oe at 1.7 K in FGT/CrOCl heterostructure through RMCD measurements is observed, and it is proposed that the larger H in RMCD measurements is related to the distribution of uncompensated spins at the interface. This work reveals several intriguing phenomena of the exchange bias effect in 2D vdW magnetic systems, which paves the way for the study of related spintronic devices.

2D magnets exchange bias effect spintronics van der Waals heterostructures

SCI ; EI

英语

其他

WOS:000763425500001

20221011742614

Chromium compounds ; Dichroism ; Germanium compounds ; Iron compounds ; Magnetic anisotropy ; Magnetism ; Tellurium compounds

Magnetism: Basic Concepts and Phenomena:701.2 ; Light/Optics:741.1 ; Physical Chemistry:801.4 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Atomic and Molecular Physics:931.3

2-s2.0-85125544226

Scopus

1.School of Materials Science and Engineering,Beihang University,Beijing,100191,China
2.Department of Physics,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.Hunan Key Laboratory of Two-Dimensional Materials,School of Physics and Electronics,Hunan University,Changsha,Hunan,410082,China
4.Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science,School of Mathematics and Physics,University of Science and Technology Beijing,Beijing,100083,China
5.Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions,High Magnetic Field Laboratory,Chinese Academy of Sciences,Hefei,Anhui,230031,China
6.State Key Laboratory for Chemo/Biosensing and Chemometrics,College of Chemistry and Chemical Engineering,Hunan University,Changsha,Hunan,419982,China

Zhang，Tianle,Zhang，Yujun,Huang，Mingyuan,et al. Tuning the Exchange Bias Effect in 2D van der Waals Ferro-/Antiferromagnetic Fe3GeTe2/CrOCl Heterostructures[J]. Advanced Science,2022,9.

Zhang，Tianle.,Zhang，Yujun.,Huang，Mingyuan.,Li，Bo.,Sun，Yinghui.,...&Yang，Shengxue.(2022).Tuning the Exchange Bias Effect in 2D van der Waals Ferro-/Antiferromagnetic Fe3GeTe2/CrOCl Heterostructures.Advanced Science,9.

Zhang，Tianle,et al."Tuning the Exchange Bias Effect in 2D van der Waals Ferro-/Antiferromagnetic Fe3GeTe2/CrOCl Heterostructures".Advanced Science 9(2022).