Abstract
The organic magnetoelectric complexes are beneficial for the development on flexible magnetoelectric devices in the future. In this work, we fabricated all organic multiferroic ferromagnetic/ferroelectric complexes to study magnetoelectric coupling at room temperature. Under the stimulus of external magnetic field, the localization of charge inside organic ferromagnets will be enhanced to affect spin–dipole interaction at organic multiferroic interfaces, where overall ferroelectric polarization is tuned to present an organic magnetoelectric coupling. Moreover, the magnetoelectric coupling of the organic ferromagnetic/ferroelectric complex is tightly dependent on incident light intensity. Decreasing light intensity, the dominated interfacial interaction will switch from spin–dipole to dipole–dipole interaction, which leads to the magnetoelectric coefficient changing from positive to negative in organic multiferroic magnetoelectric complexes.
Highlights
Spin-dependent interactions, such as Dzyaloshinskii–Moriya interaction[1,2], Rashba spin–orbit interaction[3], exchange interaction[4], have attracted more attention because of the rich physical phenomena
A pronounced magnetoelectric coupling is generated through the interaction between Yb3+ spins and Zn2+ dipoles at room temperature[5,14], where the ferroelectric polarization could be changed through applying external magnetic field
The reason why we choose P-F4TCNQ crystals and P(VDF-TrFE) to study organic magnetoelectric coupling is that P-F4TCNQ is a ferromagnetic material and P(VDF-TrFE) is a ferroelectric material
Summary
Spin-dependent interactions, such as Dzyaloshinskii–Moriya interaction[1,2], Rashba spin–orbit interaction[3], exchange interaction[4], have attracted more attention because of the rich physical phenomena. A pronounced magnetoelectric coupling is generated through the interaction between Yb3+ spins and Zn2+ dipoles at room temperature[5,14], where the ferroelectric polarization could be changed through applying external magnetic field. External magnetic field tunes the magnitude of ferroelectric polarization of multiferroic P-F4TCNQ/P(VDF-TrFE) complexes remarkably.
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