image: Dielectric constant versus temperature at 103.0 Hz, measured at zero field and under an external magnetic field of 8 T (left) and the electric polarization at different magnetic fields (right). Photo credit: Xiaolin Liu view more
Credit: ©Science China Press
This study is led by Dr. Haixia Zhao, Prof. Lasheng Long, (Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces and Department of Chemistry College of Chemistry and Chemical Engineering, Xiamen University, China) and Prof. Guilin Zhuang (College of Chemical Engineering, Zhejiang University of Technology, China). They report magnetoelectric effect in a molecular-based compound of [(CH3)3NCH2CH2Br][Fe(Cl2An)2(H2O)2] (Cl2An = chloranilate, (CH3)3NCH2CH2Br+ = (2-bromoethyl)trimethylammonium). Under the external magnetic field, the compound exhibits a positive magnetodielectric effect of up to 12%, and its polarization increases significantly with the increase of the applied magnetic field. Spin-polarized computational calculations reveal that the magnetoelectric coupling effect is mainly derived from spin-orbit coupling between FeII and Cl2An−• under the magnetic field, and the significant increase in electric polarization under magnetic field is mainly due to the spin-mediated charge transfer.
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See the article:
Magnetoelectric Effect Generated through Electron transfer from Organic Radical to Metal Ion
https://doi.org/10.1093/nsr/nwad059
Journal
National Science Review