Electrically enhanced magnetization in highly strained BiFeO3 films

Jan Chi Yang, Chang Yang Kuo, Heng Jui Liu, Hang Chen Ding, Chun Gang Duan, Hong Ji Lin, Zhiwei Hu, Tun Wen Pi, Liu Hao Tjeng, Chien Te Chen, Elke Arenholz, Qing He*, Ying Hao Chu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The control of magnetism via an electric field has attracted substantial attention because of potential applications in magnetoelectronics, spintronics and high-frequency devices. In this study, we demonstrate a new approach to enhance and control the magnetization of multiferroic thin film by an electric stimulus. First, to reduce the strength of the antiferromagnetic superexchange interaction in BiFeO 3 , we applied strain engineering to stabilize a highly strained phase. Second, the direction of the ferroelectric polarization was controlled by an electric field to enhance the Dzyaloshinskii-Moriya interaction in the highly strained BiFeO 3 phase. Because of the magnetoelectric coupling in BiFeO 3 , a strong correlation between the modulated ferroelectricity and enhanced magnetization was observed. The tunability of this strong correlation by an electric field provides an intriguing route to control ferromagnetism in a single-phase multiferroic.

Original languageEnglish
Article numbere269
Pages (from-to)1-6
Number of pages6
JournalNPG Asia Materials
Volume8
Issue number5
DOIs
StatePublished - 27 May 2016

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