DataVXACS Applied Electronic MaterialsPaper
journal article·2022-07-26

Exchange Bias Effects in Ferromagnetic MnSb2Te4 down to a Monolayer

Zhihao Zang, Ming Xi, Shangjie Tian, Roger Guzman, Tingting Wang, Wu Zhou, Hechang Lei, Yuan Huang, Yu Ye

ACS Applied Electronic Materials· Volume 4· Issue 7
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Source abstract

Abstract

The exchange bias (EB) effect is a fundamental phenomenon in conventional systems containing interfaces of ferromagnetic (FM) and antiferromagnetic (AFM) materials and plays a crucial role in magnetic memory technologies. Due to the rapid development of van der Waals (vdW) magnets, the EB effect can be constructed by assembling vdW FM and AFM materials together without the constraints of lattice matching, greatly broadening the understanding of two-dimensional (2D) magnetism. However, the EB effect in singular 2D magnets down to a monolayer has not been realized, where material design plays an important role. Here, we report a distinct EB effect in singular FM MnSb2Te4 flakes, which can be achieved by applying asymmetric field-sweeping ranges. We conjecture that the EB effect is related to the Mn–Sb site-mixing behavior in MnSb2Te4, giving rise to the presence of the pinning sites. The EB field can reach more than 30 mT at 2 K, and its direction and magnitude can be modulated by changing the field-sweeping range, providing a degree of freedom for controlling the EB effect. This work reveals intriguing EB effects in singular vdW magnetic materials and paves the way for low-dimensional spintronic devices.
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Research context

OpenAlex topics: 2D Materials and Applications · Magnetic properties of thin films · Advanced Condensed Matter Physics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking University, Beijing 100871, China

Collaborative Innovation Center of Quantum Matter, Beijing 100871, China

Department of Physics, Renmin University of China, Beijing 100872, China

School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

CAS Centre for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100049, China

Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China

Beijing Key Laboratory for Magnetoelectric Materials and Devices, Beijing 100871, China

Funding

Ministry of Education of the People's Republic of China · Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Beijing Municipality · National Natural Science Foundation of China · Chinese Academy of Sciences

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