title: Charge-transfer magnetoelectrics of polymeric multiferroics.
abstract: 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.
authors.affiliation: Department of Chemistry, University of Kansas , Lawrence, Kansas 66045, United States.
authors.forename: Wei
authors.initials: W
authors.lastname: Qin
authors.forename: Daniel
authors.initials: D
authors.lastname: Jasion
authors.forename: Xiaomin
authors.initials: X
authors.lastname: Chen
authors.forename: Manfred
authors.initials: M
authors.lastname: Wuttig
authors.forename: Shenqiang
authors.initials: S
authors.lastname: Ren