Modulated and enhanced magnetoelectric coupling in multiferroic [see pdf]
School of Physics and Electronics, North China University of Water Resources and Electric Power, Zhengzhou, 450045, China
2 Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
* e-mail: firstname.lastname@example.org
Accepted: 11 March 2020
Published online: 2 April 2020
We investigate the effects of doping on the magnetism, ferroelectricity, and magnetoelectric coupling in the . The lower Co doping (at ) suppresses the commensurate collinear antiferromagnetic phase (AF1 phase) and stabilizes the ferroelectric phase down to . For higher Co substitution levels and 0.07, the ferroelectric polarization P reaches a peak at and , respectively, and decreases to nonzero (measured at ) with further cooling, which can be attributed into a continuous rotation of the spiral plane driven by the small change in temperature. The polarization P at increases monotonically with cooling, which suggests the orientation of the spin helix unchanged. Ferroelectric polarization P reverses synchronously with the applying the cyclic oscillation external magnetic field and suggests that the polarization P is strongly coupled with the magnetism in the sample.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature, 2020