Modulated and enhanced magnetoelectric coupling in multiferroic [inline-graphic not available: see fulltext]
Abstract
We investigate the effects of Co2+ doping on the magnetism, ferroelectricity, and magnetoelectric coupling in the Mn1-xCoxWO4(0 ≤x ≤0.1 ) . The lower Co doping (at x ≤0.05 ) suppresses the commensurate collinear antiferromagnetic phase (AF1 phase) and stabilizes the ferroelectric phase down to T =2 K . For higher Co substitution levels x =0.06 and 0.07, the ferroelectric polarization P reaches a peak at T =10.2 K and T =8.7 K , respectively, and decreases to nonzero (measured at T =2 K ) 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 x =0.1 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 Mn0.95Co0.05WO4 sample.
- Publication:
-
European Physical Journal Plus
- Pub Date:
- April 2020
- DOI:
- 10.1140/epjp/s13360-020-00327-6
- Bibcode:
- 2020EPJP..135..346L