Manipulating magnetoelectric energy landscape in multiferroics

Yen-Lin Huang, Dmitri Nikonov, Christopher Addiego, Rajesh V. Chopdekar, Bhagwati Prasad, Lei Zhang, Jyotirmoy Chatterjee, Heng Jui Liu, Alan Farhan, Ying-Hao Chu, Mengmeng Yang, Maya Ramesh, Zi Qiang Qiu, Bryan D. Huey, Chia Ching Lin, Tanay Gosavi, Jorge Íñiguez, Jeffrey Bokor, Xiaoqing Pan, Ian YoungLane W. Martin, Ramamoorthy Ramesh*

*此作品的通信作者

研究成果: Article同行評審

51 引文 斯高帕斯(Scopus)

摘要

Magnetoelectric coupling at room temperature in multiferroic materials, such as BiFeO3, is one of the leading candidates to develop low-power spintronics and emerging memory technologies. Although extensive research activity has been devoted recently to exploring the physical properties, especially focusing on ferroelectricity and antiferromagnetism in chemically modified BiFeO3, a concrete understanding of the magnetoelectric coupling is yet to be fulfilled. We have discovered that La substitutions at the Bi-site lead to a progressive increase in the degeneracy of the potential energy landscape of the BiFeO3 system exemplified by a rotation of the polar axis away from the 〈111〉pc towards the 〈112〉pc discretion. This is accompanied by corresponding rotation of the antiferromagnetic axis as well, thus maintaining the right-handed vectorial relationship between ferroelectric polarization, antiferromagnetic vector and the Dzyaloshinskii-Moriya vector. As a consequence, La-BiFeO3 films exhibit a magnetoelectric coupling that is distinctly different from the undoped BiFeO3 films.

原文English
文章編號2836
期刊Nature Communications
11
發行號1
DOIs
出版狀態Published - 1 12月 2020

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