Giant magnetoelectric effect at the graphone/ferroelectric interface

[en] Multiferroic heterostructures combining ferromagnetic and ferroelectric layers are promising for applications in novel spintronic devices, such as memories with electrical writing and magnetic reading, assuming their magnetoelectric coupling (MEC) is strong enough. For conventional magnetic metal/ferroelectric heterostructures, however, the change of interfacial magnetic moment upon reversal of the electric polarization is often very weak. Here, by using first principles calculations, we demonstrate a new pathway towards a strong MEC at the interface between the semi-hydrogenated graphene (also called graphone) and ferroelectric PbTiO3. By reversing the polarization of PbTiO3, the magnetization of graphone can be electrically switched on and off through the change of carbon-oxygen bonding at the interface. Furthermore, a ferroelectric polarization can be preserved down to ultrathin PbTiO3 layers less than one nanometer due to an enhancement of the polarization at the interface. The predicted strong magnetoelectric effect in the ultimately thin graphone/ferroelectric layers opens a new opportunity for the electric control of magnetism in high-density devices. © 2018, The Author(s).

Disciplines :

Physics

Author, co-author :

Wang, J.; Department of Engineering Mechanics & Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, 38 Zheda Road, Hangzhou, 310007, China

Zhang, Yajun ; Université de Liège - ULiège > Département de physique > Physique théorique des matériaux

Sahoo, M. P. K.; Department of Engineering Mechanics & Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, 38 Zheda Road, Hangzhou, 310007, China

Shimada, T.; Department of Mechanical Engineering and Science, Kyoto University, Nishikyo-ku, Kyoto, 615-8540, Japan

Kitamura, T.; Department of Mechanical Engineering and Science, Kyoto University, Nishikyo-ku, Kyoto, 615-8540, Japan

Ghosez, Philippe ; Université de Liège - ULiège > Département de physique > Physique théorique des matériaux

Zhang, T.-Y.; Shanghai University Materials Genome Institute and Shanghai Materials Genome Institute, Shanghai University, 99 Shangda Road, Shanghai, 200444, China

Language :

English

Title :

Giant magnetoelectric effect at the graphone/ferroelectric interface

Publication date :

2018

Journal title :

Scientific Reports

eISSN :

2045-2322

Publisher :

Nature Publishing Group

Volume :

Pages :

12448

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

HiT4FiTDivision of Arctic SciencesNatural Science Foundation of Zhejiang Province: LZ17A020001National Natural Science Foundation of China: 11672264, 11472242, 11621062Fundamental Research Funds for the Central Universities: 2018XZZX001-05

Available on ORBi :

since 02 July 2019

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