Continuous modulation of charge-spin conversion by electric field in Pt/Co2FeSi/Pb(Mg1/3Nb2/3)O3-Pb0.7Ti0.3O3 heterostructures

doi:10.1088/1674-1056/acb2c0

中国物理B ›› 2023, Vol. 32 ›› Issue (5): 56701-056701.doi: 10.1088/1674-1056/acb2c0

Continuous modulation of charge-spin conversion by electric field in Pt/Co₂FeSi/Pb(Mg_1/3Nb_2/3)O₃-Pb_0.7Ti_0.3O₃ heterostructures

Yibing Zhao(赵逸冰)^1,2,†, Xiaoxiao Fang(方晓筱)^1,2,†, Zhirui Wang(王志睿)^1,2, Miao Cheng(程淼)^1,2, Yongjia Tan(谭永嘉)^1,2, Dongxiong Wei(韦东雄)^1,2, Changjun Jiang(蒋长军)^1,2, and Jinli Yao(幺金丽)^1,2,‡

1 Key Laboratory for Magnetism and Magnetic Materials(Ministry of Education), Lanzhou University, Lanzhou 730000, China;
2 Key Laboratory of Special Function Materials and Structure Design(Ministry of Education), Lanzhou University, Lanzhou 730000, China

收稿日期:2022-07-24 修回日期:2023-01-12 接受日期:2023-01-13 出版日期:2023-04-21 发布日期:2023-05-05
通讯作者: Jinli Yao E-mail:yaojl@lzu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11974149) and the Natural Science Foundation of Gansu Province (Grant No. 21JR7RA472).

Continuous modulation of charge-spin conversion by electric field in Pt/Co₂FeSi/Pb(Mg_1/3Nb_2/3)O₃-Pb_0.7Ti_0.3O₃ heterostructures

1 Key Laboratory for Magnetism and Magnetic Materials(Ministry of Education), Lanzhou University, Lanzhou 730000, China;
2 Key Laboratory of Special Function Materials and Structure Design(Ministry of Education), Lanzhou University, Lanzhou 730000, China

Received:2022-07-24 Revised:2023-01-12 Accepted:2023-01-13 Online:2023-04-21 Published:2023-05-05
Contact: Jinli Yao E-mail:yaojl@lzu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11974149) and the Natural Science Foundation of Gansu Province (Grant No. 21JR7RA472).

摘要/Abstract

摘要： The half-metallic Heusler alloy Co$_{2}$FeSi is an ideal material in spintronic devices due to its higher spin polarization, higher Curie temperature and lower damping parameters. In this work, the dynamic magnetism of Co$_{2}$FeSi is modulated by electric field and it is demonstrated that the charge-spin conversion efficiency $\xi $ is continuous and controllable by the electric field. We further find an extremely high $\xi $ in ferromagnetic/ferroelectric (FM/FE) heterostructures, which could be ascribed to interfacial effect in FM/FE interface. Moreover, we investigate that the charge-spin conversion efficiency varies with the electric field in a butterfly-like behavior, which accords with the $S$-$E$ curve of Pb(Mg$_{1/3}$Nb$_{2/3})$O$_{3}$-Pb$_{0.7}$Ti$_{0.3}$O$_{3}$(PMN-PT) and could be attributed to strain effect. The modulation of charge-spin conversion efficiency in FM/FE heterostructures via electric field presents a profound potential for next-generation spintronic devices and applications of current-induced magnetization switching.

关键词: Heusler alloy, electric-field modulation, strain effect, Rashba effect

Abstract: The half-metallic Heusler alloy Co$_{2}$FeSi is an ideal material in spintronic devices due to its higher spin polarization, higher Curie temperature and lower damping parameters. In this work, the dynamic magnetism of Co$_{2}$FeSi is modulated by electric field and it is demonstrated that the charge-spin conversion efficiency $\xi $ is continuous and controllable by the electric field. We further find an extremely high $\xi $ in ferromagnetic/ferroelectric (FM/FE) heterostructures, which could be ascribed to interfacial effect in FM/FE interface. Moreover, we investigate that the charge-spin conversion efficiency varies with the electric field in a butterfly-like behavior, which accords with the $S$-$E$ curve of Pb(Mg$_{1/3}$Nb$_{2/3})$O$_{3}$-Pb$_{0.7}$Ti$_{0.3}$O$_{3}$(PMN-PT) and could be attributed to strain effect. The modulation of charge-spin conversion efficiency in FM/FE heterostructures via electric field presents a profound potential for next-generation spintronic devices and applications of current-induced magnetization switching.

Key words: Heusler alloy, electric-field modulation, strain effect, Rashba effect

中图分类号: (Magnetic properties, NMR)

67.30.er

67.80.dk (Magnetic properties, phases, and NMR) 75.50.-y (Studies of specific magnetic materials) 75.70.-i (Magnetic properties of thin films, surfaces, and interfaces)

Yibing Zhao(赵逸冰), Xiaoxiao Fang(方晓筱), Zhirui Wang(王志睿), Miao Cheng(程淼), Yongjia Tan(谭永嘉), Dongxiong Wei(韦东雄), Changjun Jiang(蒋长军), and Jinli Yao(幺金丽). Continuous modulation of charge-spin conversion by electric field in Pt/Co₂FeSi/Pb(Mg_1/3Nb_2/3)O₃-Pb_0.7Ti_0.3O₃ heterostructures[J]. 中国物理B, 2023, 32(5): 56701-056701.

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Continuous modulation of charge-spin conversion by electric field in Pt/Co₂FeSi/Pb(Mg_1/3Nb_2/3)O₃-Pb_0.7Ti_0.3O₃ heterostructures

Continuous modulation of charge-spin conversion by electric field in Pt/Co₂FeSi/Pb(Mg_1/3Nb_2/3)O₃-Pb_0.7Ti_0.3O₃ heterostructures

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