Electrically enhanced magnetization in highly strained BiFeO3 films

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

doi:10.1038/am.2016.55

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Electrically enhanced magnetization in highly strained BiFeO₃ films

MPG-Autoren

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Yang, Jan-Chi
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Kuo, Chang-Yang
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Hu, Zhiwei
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Tjeng, Liu Hao
Liu Hao Tjeng, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Zitation

Yang, J.-C., Kuo, C.-Y., Liu, H.-J., Ding, H.-C., Duan, C.-G., Lin, H.-J., et al. (2016). Electrically enhanced magnetization in highly strained BiFeO₃ films. NPG Asia Materials, 8: e269, pp. 1-6. doi:10.1038/am.2016.55.

Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002A-81B7-6

Zusammenfassung

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 BiFeO3, 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 BiFeO3 phase. Because of the magnetoelectric coupling in BiFeO3, 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.