Zhao Ye, Gao Xingguo, Yang Ruilong, Yang Ke, Dou Jiarui, Guo Jinzhong, Yang Xiaoting, Zhou Guowei, Xu Xiaohong
School of Chemistry and Materials Science of Shanxi Normal University & Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education Taiyuan 030006 China
Research Institute of Materials Science of Shanxi Normal University & Collaborative Innovation Center for Advanced Permanent Magnetic Materials and Techonology Taiyuan 030006 China.
RSC Adv. 2025 Jan 3;15(1):370-376. doi: 10.1039/d4ra06719c. eCollection 2025 Jan 2.
Artificial heterostructures are often realized by stacking different materials to present new emerging properties that are not exhibited by their individual constituents. In this work, non-layered two-dimensional α-MnSe nanosheets were transferred onto LaMnO (LMO) films to obtain a multifunctional heterostructure. The high crystal quality of the MnSe/LMO heterostructure was revealed by X-ray diffraction, Raman spectroscopy, and scanning electron microscopy measurements. The enhancement of the saturated magnetization and coercive field and synchrotron X-ray measurements indicated the magnetic exchange coupling effect present in this MnSe/LMO heterostructure. The exchange bias field and coercive field reached 400 Oe and 1013 Oe under a positive 5k Oe field-cooling process. Thus, an outstanding photodetector with photoresponsivity of 4.1 × 10 A W and photo detectivity of 2.6 × 10 jones was obtained with a luminescence of 532 nm for this MnSe/LMO heterostructure. The multifunction characteristics of magnetic exchange coupling and photodetection in this heterostructure are very useful for next-generation devices.
人工异质结构通常通过堆叠不同材料来实现，以展现其单个成分所不具备的新出现的特性。在这项工作中，非层状二维α-MnSe纳米片被转移到LaMnO（LMO）薄膜上，以获得一种多功能异质结构。通过X射线衍射、拉曼光谱和扫描电子显微镜测量揭示了MnSe/LMO异质结构的高晶体质量。饱和磁化强度和矫顽场的增强以及同步加速器X射线测量表明该MnSe/LMO异质结构中存在磁交换耦合效应。在正向5k Oe场冷过程下，交换偏置场和矫顽场分别达到400 Oe和1013 Oe。因此，对于这种MnSe/LMO异质结构，在532 nm发光条件下获得了一个光响应度为4.1×10 A/W且光探测率为2.6×10琼斯的出色光电探测器。这种异质结构中磁交换耦合和光探测的多功能特性对下一代器件非常有用。
