Magnetoelectric coupling effect of polarization regulation in BiFeO3/LaTiO3 heterostructures

doi:10.1088/1674-1056/abf924

中国物理B ›› 2021, Vol. 30 ›› Issue (7): 76105-076105.doi: 10.1088/1674-1056/abf924

Magnetoelectric coupling effect of polarization regulation in BiFeO₃/LaTiO₃ heterostructures

Chao Jin(金超)¹, Feng-Zhu Ren(任凤竹)^1,†, Wei Sun(孙伟)¹, Jing-Yu Li(李静玉)¹, Bing Wang(王冰)^1,‡, and Qin-Fen Gu(顾勤奋)^2,§

1 Institute for Computational Materials Science, School of Physics and Electronics, International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, Henan University, Kaifeng 475004, China;
2 Australian Synchrotron, ANSTO, 800 Blackburn Rd, Clayton, VIC, 3168, Australia

收稿日期:2021-02-23 修回日期:2021-04-11 接受日期:2021-04-19 出版日期:2021-06-22 发布日期:2021-07-09
通讯作者: Feng-Zhu Ren, Bing Wang, Qin-Fen Gu E-mail:f.z.ren@henu.edu.cn;bwang@vip.henu.edu.cn;qinfeng@ansto.gov.au
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 12047517), the International Cooperation Project of Science and Technology of Henan Province, China (Grant No. 182102410096), the Natural Science Foundation of Henan Province, China (Grant No. 202300410069), and the China Postdoctoral Science Foundation (Grant Nos. 2020M682274 and 2020TQ0089).

Magnetoelectric coupling effect of polarization regulation in BiFeO₃/LaTiO₃ heterostructures

Chao Jin(金超)¹, Feng-Zhu Ren(任凤竹)^1,†, Wei Sun(孙伟)¹, Jing-Yu Li(李静玉)¹, Bing Wang(王冰)^1,‡, and Qin-Fen Gu(顾勤奋)^2,§

1 Institute for Computational Materials Science, School of Physics and Electronics, International Joint Research Laboratory of New Energy Materials and Devices of Henan Province, Henan University, Kaifeng 475004, China;
2 Australian Synchrotron, ANSTO, 800 Blackburn Rd, Clayton, VIC, 3168, Australia

Received:2021-02-23 Revised:2021-04-11 Accepted:2021-04-19 Online:2021-06-22 Published:2021-07-09
Contact: Feng-Zhu Ren, Bing Wang, Qin-Fen Gu E-mail:f.z.ren@henu.edu.cn;bwang@vip.henu.edu.cn;qinfeng@ansto.gov.au
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 12047517), the International Cooperation Project of Science and Technology of Henan Province, China (Grant No. 182102410096), the Natural Science Foundation of Henan Province, China (Grant No. 202300410069), and the China Postdoctoral Science Foundation (Grant Nos. 2020M682274 and 2020TQ0089).

摘要/Abstract

摘要： An effective regulation of the magnetism and interface of ferromagnetic materials is not only of great scientific significance, but also has an urgent need in modern industry. In this work, by using the first-principles calculations, we demonstrate an effective approach to achieve non-volatile electrical control of ferromagnets, which proves this idea in multiferroic heterostructures of ferromagnetic LaTiO₃ and ferroelectric BiFeO₃. The results show that the magnetic properties and two-dimensional electron gas concentrations of LaTiO₃ films can be controlled by changing the polarization directions of BiFeO₃. The destroyed symmetry being introduced by ferroelectric polarization of the system leads to the transfer and reconstruction of the Ti-3d electrons, which is the fundamental reason for the changing of magnetic properties. This multiferroic heterostructures will pave the way for non-volatile electrical control of ferromagnets and have potential applications.

关键词: first-principles calculations, BiFeO₃/LaTiO₃ heterostructures, magnetoelectric coupling effect, polarization regulation

Abstract: An effective regulation of the magnetism and interface of ferromagnetic materials is not only of great scientific significance, but also has an urgent need in modern industry. In this work, by using the first-principles calculations, we demonstrate an effective approach to achieve non-volatile electrical control of ferromagnets, which proves this idea in multiferroic heterostructures of ferromagnetic LaTiO₃ and ferroelectric BiFeO₃. The results show that the magnetic properties and two-dimensional electron gas concentrations of LaTiO₃ films can be controlled by changing the polarization directions of BiFeO₃. The destroyed symmetry being introduced by ferroelectric polarization of the system leads to the transfer and reconstruction of the Ti-3d electrons, which is the fundamental reason for the changing of magnetic properties. This multiferroic heterostructures will pave the way for non-volatile electrical control of ferromagnets and have potential applications.

Key words: first-principles calculations, BiFeO₃/LaTiO₃ heterostructures, magnetoelectric coupling effect, polarization regulation

中图分类号: (Theory of crystal structure, crystal symmetry; calculations and modeling)

61.50.Ah

73.40.Lq (Other semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions) 75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures)) 77.55.Nv (Multiferroic/magnetoelectric films)

Chao Jin(金超), Feng-Zhu Ren(任凤竹), Wei Sun(孙伟), Jing-Yu Li(李静玉), Bing Wang(王冰), and Qin-Fen Gu(顾勤奋). Magnetoelectric coupling effect of polarization regulation in BiFeO₃/LaTiO₃ heterostructures[J]. 中国物理B, 2021, 30(7): 76105-076105.

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Magnetoelectric coupling effect of polarization regulation in BiFeO₃/LaTiO₃ heterostructures

Magnetoelectric coupling effect of polarization regulation in BiFeO₃/LaTiO₃ heterostructures

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