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Electric field control of deterministic current-induced magnetization switching in a hybrid ferromagnetic/ferroelectric structure

Cai, Kai-Ming; Yang, Mei-Yin; Ju, Hailang; Wang, Sumei; Ji, Yang; Li, Baohe; Edmonds, K.W.; Sheng, Yu; Zhang, Bao; Zhang, Nan; Liu, Shuai; Zheng, Hou-Zhi; Wang, Kaiyou

Authors

Kai-Ming Cai

Mei-Yin Yang

Hailang Ju

Sumei Wang

Yang Ji

Baohe Li

KEVIN EDMONDS kevin.edmonds@nottingham.ac.uk
Associate Professor & Reader in Physics

Yu Sheng

Bao Zhang

Nan Zhang

Shuai Liu

Hou-Zhi Zheng

Kaiyou Wang



Abstract

All-electrical and programmable manipulations of ferromagnetic bits are highly pursued for the aim of high integration and low energy consumption in modern information technology1, 2, 3. Methods based on the spin–orbit torque switching4, 5, 6 in heavy metal/ferromagnet structures have been proposed with magnetic field7, 8, 9, 10, 11, 12, 13, 14, 15, and are heading toward deterministic switching without external magnetic field16, 17. Here we demonstrate that an in-plane effective magnetic field can be induced by an electric field without breaking the symmetry of the structure of the thin film, and realize the deterministic magnetization switching in a hybrid ferromagnetic/ferroelectric structure with Pt/Co/Ni/Co/Pt layers on PMN-PT substrate. The effective magnetic field can be reversed by changing the direction of the applied electric field on the PMN-PT substrate, which fully replaces the controllability function of the external magnetic field. The electric field is found to generate an additional spin–orbit torque on the CoNiCo magnets, which is confirmed by macrospin calculations and micromagnetic simulations.

Citation

Cai, K., Yang, M., Ju, H., Wang, S., Ji, Y., Li, B., …Wang, K. (in press). Electric field control of deterministic current-induced magnetization switching in a hybrid ferromagnetic/ferroelectric structure. Nature Materials, 16(7), https://doi.org/10.1038/nmat4886

Journal Article Type Article
Acceptance Date Mar 1, 2017
Online Publication Date Apr 3, 2017
Deposit Date Apr 19, 2017
Publicly Available Date Apr 19, 2017
Journal Nature Materials
Print ISSN 1476-1122
Electronic ISSN 1476-4660
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 16
Issue 7
DOI https://doi.org/10.1038/nmat4886
Keywords Ferromagnetism, Magnetic properties and materials
Public URL https://nottingham-repository.worktribe.com/output/854511
Publisher URL http://www.nature.com/nmat/journal/vaop/ncurrent/full/nmat4886.html

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