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ACS Nano. 2014 Apr 22;8(4):3671-7. doi: 10.1021/nn500323j. Epub 2014 Mar 26.

Charge-transfer magnetoelectrics of polymeric multiferroics.

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Department of Chemistry, University of Kansas , Lawrence, Kansas 66045, United States.


The renaissance of multiferroics has yielded a deeper understanding of magneto-electric coupling of inorganic single-phase multiferroics and composites. Here, we report charge-transfer polymeric multiferroics, which exhibit external field-controlled magnetic, ferroelectric, and microwave response, as well as magneto-dielectric coupling. The charge-transfer-controlled ferroic properties result from the magnetic field-tunable triplet exciton which has been validated by the dynamic polaron-bipolaron transition model. In addition, the temperature-dependent dielectric discontinuity and electric-field-dependent polarization confirms room temperature ferroelectricity of crystalline charge-transfer polymeric multiferroics due to the triplet exciton, which allows the tunability of polarization by the photoexcitation.


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