Tunable magneto-Seebeck effect in Co_(2)FeSi/MgO/Co_(2)FeSi heterostructure via optimized interfacial engineering

作     者：Jingyu Li Xianbiao Shi Yurong Jin Le Ma Liuming Wei Chi Zhang Hang Li Peng-Fei Liu 

作者机构：International Joint Research Laboratory of New Energy Materials and Devices of Henan ProvinceSchool of Physics and ElectronicsHenan UniversityKaifeng 475004China Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science CenterDongguan 523803China Defence Industry Secrecy Examination and Certification CenterBeijing 100089China School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China Department of Network SecurityHenan Police CollegeZhengzhou 450046China College of Electrical EngineeringHenan University of TechnologyZhengzhou 450001China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2024年第67卷第3期

页      面：128-135页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (Grant No. 12104458) Foshan (Southern China) Institute for New Materials (Grant No. 2021AYF25021) 

主　　题：magneto-Seebeck effect interface spintronics electronic structure spin-Seebeck effect 

摘      要：Enhancing the tunneling magneto-Seebeck(TMS) ratio and uncovering its underlying mechanism are greatly demanded in spin *** magnitude and sign of the TMS effect depend on the type of atom and the stacking order of atoms at the ***,we demonstrate that TMS ratios can be effectively manipulated by altering heterogonous or homogeneous interface through decoration on the CoFeSi(001) surface inserted on the MgO insulating *** maximum TMS ratio of pure Co_(2)/O termination is 4565% at 800 ***,the TMS ratio of the FeSi/O termination has two peak values,of which the maximum could reach up to-3290% at 650 *** comparing two different atom arrangements at the interface,we reveal that the sign and symbol of the TMS ratio can be controlled by the temperature and different atomic configurations at the Co_(2)FeSi/MgO ***,the spin-Seebeck coefficient up to ~150 μV/K is also possible when we select suitable terminations and *** findings will provide useful insights into how to control the sign and symbol of the TMS ratio and accordingly stimulate the development field of magneto-thermoelectric power and spin caloritronic devices based on the magneto-Seebeck effect in Heusler-based metallic multilayers.