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- Title
Magnetoelectric coupling in multiferroics probed by optical second harmonic generation.
- Authors
Xu, Shuai; Wang, Jiesu; Chen, Pan; Jin, Kuijuan; Ma, Cheng; Wu, Shiyao; Guo, Erjia; Ge, Chen; Wang, Can; Xu, Xiulai; Yao, Hongbao; Wang, Jingyi; Xie, Donggang; Wang, Xinyan; Chang, Kai; Bai, Xuedong; Yang, Guozhen
- 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. Here, the authors probe a magneto-electric coupling in freestanding BiFeO3 by optical second harmonic generation with varying magnetic field and temperature. They find the coupling to be suppressed by strain releasing whereas it remains robust against thermal fluctuations.
- Subjects
SECOND harmonic generation; MULTIFERROIC materials; ANTIFERROMAGNETIC materials; OPTICAL constants; MAGNETIC fields
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-38055-x