Zhao Shishun, Zhao Yifan, Tian Bian, Liu Junxue, Jin Shengye, Jiang Zhuangde, Zhou Ziyao, Liu Ming
Ministry Education Key Laboratory of Electronic Materials Research Laboratory, School of Electronic Science and Engineering, State Key Laboratory for Mechanical Behavior of Materials, the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, Xi 'an Jiaotong University, Xi'an 710049, China.
State Key Laboratory for Mechanical Manufacturing Systems Engineering, International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology, School of Mechanical Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
ACS Appl Mater Interfaces. 2020 Sep 16;12(37):41999-42006. doi: 10.1021/acsami.0c11954. Epub 2020 Sep 2.
The demand for low-power flexible spintronics for sensing, communicating, and data processing applications boosts an intense search for novel ways of controlling magnetism. In this work, a photovoltaic controllable flexible spintronic device within a Kapton/Ta/Co/(PCBM/PTB7-Th)/Pt heterostructure was demonstrated, and the magnetic anisotropy change of this flexible heterostructure as a function of the external light radiation and strain was quantitatively determined. 150 mW/cm white light illumination induced 489 Oe out-of-plane ferromagnetic resonance field modulation, which was attributed to the photogenerated electron doping in the cobalt film. The chemical contamination effect and the interfacial oxidation effect during the photovoltaic doping process were eliminated. Moreover, it was found that the working function of the thin-film electrodes were different from the bulk values via an ultraviolet photoelectron spectroscopy test. Our results on flexible photovoltaic spintronics systems will invigorate the research toward the development of solar-driven energy-efficient spintronics.
对用于传感、通信和数据处理应用的低功耗柔性自旋电子学的需求推动了对控制磁性新方法的深入探索。在这项工作中，展示了一种在Kapton/Ta/Co/(PCBM/PTB7-Th)/Pt异质结构内的光伏可控柔性自旋电子器件，并定量确定了这种柔性异质结构的磁各向异性变化与外部光辐射和应变的函数关系。150 mW/cm的白光照射引起了489 Oe的面外铁磁共振场调制，这归因于钴膜中的光生电子掺杂。消除了光伏掺杂过程中的化学污染效应和界面氧化效应。此外，通过紫外光电子能谱测试发现薄膜电极的功函数与体材料值不同。我们在柔性光伏自旋电子学系统方面的研究成果将推动太阳能驱动的节能自旋电子学发展的研究。
