Magnetoelectric coupling in multiferroics probed by optical second harmonic generation

Shuai Xu, Jiesu Wang, Pan Chen, Kuijuan Jin (), Cheng Ma, Shiyao Wu, Erjia Guo, Chen Ge, Can Wang, Xiulai Xu, Hongbao Yao, Jingyi Wang, Donggang Xie, Xinyan Wang, Kai Chang, Xuedong Bai and Guozhen Yang
Additional contact information
Shuai Xu: Chinese Academy of Sciences
Jiesu Wang: Beijing Academy of Quantum Information Sciences
Pan Chen: Chinese Academy of Sciences
Kuijuan Jin: Chinese Academy of Sciences
Cheng Ma: Chinese Academy of Sciences
Shiyao Wu: Beijing Academy of Quantum Information Sciences
Erjia Guo: Chinese Academy of Sciences
Chen Ge: Chinese Academy of Sciences
Can Wang: Chinese Academy of Sciences
Xiulai Xu: Chinese Academy of Sciences
Hongbao Yao: Chinese Academy of Sciences
Jingyi Wang: Chinese Academy of Sciences
Donggang Xie: Chinese Academy of Sciences
Xinyan Wang: Chinese Academy of Sciences
Kai Chang: Beijing Academy of Quantum Information Sciences
Xuedong Bai: Chinese Academy of Sciences
Guozhen Yang: Chinese Academy of Sciences

Nature Communications, 2023, vol. 14, issue 1, 1-8

Abstract: Abstract Magnetoelectric coupling, as a fundamental physical nature and with the potential to add functionality to devices while also reducing energy consumption, has been challenging to be probed in freestanding membranes or two-dimensional materials due to their instability and fragility. In this paper, we report a magnetoelectric coupling probed by optical second harmonic generation with external magnetic field, and show the manipulation of the ferroelectric and antiferromagnetic orders by the magnetic and thermal fields in BiFeO3 films epitaxially grown on the substrates and in the freestanding ones. Here we define an optical magnetoelectric-coupling constant, denoting the ability of controlling light-induced nonlinear polarization by the magnetic field, and found the magnetoelectric-coupling was suppressed by strain releasing but remain robust against thermal fluctuation for freestanding BiFeO3.

Date: 2023
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DOI: 10.1038/s41467-023-38055-x

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