Improving solar control of magnetism in ternary organic photovoltaic system with enhanced photo-induced electrons doping  

作　　者：Yujing Du Shiping Wang Lei Wang Shengye Jin Yifan Zhao Tai Min Zhuangde Jiang Ziyao Zhou Ming Liu 

机构地区：[1]Electronic Materials Research Laboratory,Key Laboratory of the Ministry of Education&International Center for Dielectric Research,School of Electronic Science and Engineering,the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology,Xi'an Jiaotong University,Xi'an 710049,China [2]State Key Laboratory of Molecular Reaction Dynamics and Collaborative Innovation Center of Chemistry for Energy Materials(iChEM),Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [3]Center for Spintronics and Quantum Systems,State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China [4]State Key Laboratory for Manufacturing Systems Engineering,Collaborative Innovation Center of High-End Manufacturing Equipment,the International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology,Xi'an Jiaotong University,Xi'an 710049,China

出　　处：《Nano Research》2022年第3期2626-2633,共8页纳米研究（英文版）

基　　金：the National Key R&D Program of China(Nos.2019YFA0307900 and 2018YFB0407601);the National Natural Science Foundation of China(Nos.91964109,11534015,51802248,11804266,and 62001366);the National 111 Project of China(No.B14040);the Fundamental Research Funds for the Central Universities(No.xjh012019042);the China Postdoctoral Science Foundation(Nos.2018M643636).

摘　　要：§The growing demand for storage space has promoted in-depth research on magnetic performance regulation in an energy-saving way.Recently,we developed a solar control of magnetism,allowing the magnetic moment to be manipulated by sunlight instead of the magnetic field,current,or laser.Here,binary and ternary photoactive systems with different photon-to-electron conversions are proposed.The photovoltaic/magnetic heterostructures with a ternary system induce larger magnetic changes due to higher short current density(J SC)(20.92 mA·cm^(−2))compared with the binary system(11.94 mA·cm^(−2)).During the sunlight illumination,ferromagnetic resonance(FMR)shift increases by 80%(from 169.52 to 305.48 Oe)attributed to enhanced photo-induced electrons doping,and the variation of saturation magnetization(M S)is also amplified by 14%(from 9.9%to 11.3%).Furthermore,photovoltaic performance analysis and the transient absorption(TA)spectra indicate that the current density plays a major role in visible light manipulating magnetism.These findings clarify the laws of sunlight control of magnetism and lay the foundation for the next generation solar-driven magneto-optical memory applications.

关 键 词：multiferroic heterostructure magnetoelectric coupling ferromagnetic resonance magnetic anisotropy interface charge doping 

分 类 号：O441[理学—电磁学]