Magnetic domain wall motion triggered by electric field

Abstract

Abstract. We propose the new approach to the problem of electrically controlled magnetic state: the electric field driven domain wall motion. The effect is demonstrated in iron garnet films in ambient conditions. The theoretical model based on inhomogenous magnetoelectric interaction provides with the necessary criteria of the effect and the way to maximize it.

Micromagnetism and topological defects in magnetoelectric media

“…Wavy arrows mark laser radiation [28]. (2) head of a magnetic domain; (b) attraction of the head to the needle at a potential that is positive relative to the substrate; (c) repulsion of the head from the needle at a negative potential [30]. Table 1) [28].…”

Symmetry theory of the flexomagnetoelectric effect in the magnetic domain walls

“…The electric polarization can be induced by the homogeneous [3][4][5][6][7] and inhomogeneous [8][9][10][11][12] magnetization distributions. The last are micromagnetic structures like domain walls (DWs) [8,[12][13][14][15][16][17] and magnetic vortexes [18]. It was shown [17] that the magnetoelectric coupling in the magnetic DWs can be described in the same manner as the ferroelectricity in the spiral magnets.…”

On the free energy of the flexomagnetoelectric interactions

“…Different phenomena correspond to the cases of the coupling with homogeneous [3][4][5][6][7] and inhomogeneous [8][9][10][11][12][13] magnetization. The latter type of phenomena exists in the magnetic domain walls [8,[12][13][14][15][16][17] and magnetic vortexes [18,19]. These types of the magnetoelectric interactions have been described by the Lifshitz invariant-like single-constant coupling term P i (M j r k M n À M n r k M j ) [11,17].…”