X. Xue, Z. Zhou,* G. Dong, M. Feng, Y. Zhang, S. Zhao, Z. Hu, W. Ren, Z-G Ye, Y. Liu, M. Liu*, “Discovery of Enhanced Magnetoelectric Coupling through Electric Field Control of Two-Magnon Scattering within Distorted Nanostructures”, ACS Nano DOI: 10.1021/acsnano.7b04653
Keywords:ferromagnetic resonance; magnetoelectric coupling; spin waves; spin−lattice coupling; two-magnon scatteringFull text
Electric field control of dynamic spin interactions is promising to break through the limitation of magnetostatic interaction based magnetoelectric (ME) effect. In this work, electric field control of two-magnon scattering (TMS) effect excited by in-plane lattice rotation has been demonstrated in La0.7Sr0.3MnO3 (LSMO)/Pb(Mn2/3Nb1/3)-PbTiO3 (PMN-PT) (011) multiferroic heterostructure. Compared with the conventional strain-mediated ME effect, a giant enhancement of ME effect up to 950% at the TMS critical angle is precisely determined by angular resolution of the ferromagnetic resonance (FMR) measurement. Particularly, a large electric field modulation of magnetic anisotropy (464 Oe) and FMR linewidth (401 Oe) are achieved at 173 K. The electric-field controllable TMS effect and its correlated ME effect have been explained by electric field modulation of the planar spin interactions triggered by spin-lattice coupling. The enhancement of the ME effect at various temperatures and spin dynamics control are promising paradigms for next generation voltage tunable spintronic devices.