Volume 129, Number 2, January 2020
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||24 February 2020|
The electric-field–induced “zero-degree domain walls” in ferromagnets
1 Physics Department, M.V. Lomonosov Moscow State University - Leninskie gori, MSU, 119991, Moscow, Russia
2 Bashkir State University - 32, Z. Validy Str., 450076, Ufa, Russia
3 Ufa State Aviation Technical University - 12, K. Marx Str. 450008, Ufa, Russia
Received: 30 September 2019
Accepted: 29 January 2020
The internal structure of electric-field–induced magnetic topological defects in dielectric magnetic film with inhomogeneous magnetoelectric effect is considered. It is shown that this “zero-degree domain wall” has a complex internal structure with the sense of magnetization rotation and corresponding electric polarity changing twice across the wall. The two possible solutions corresponding to 0° domain walls (the pure cycloidal domain wall and the mixed one) as well as their energies are analyzed. It is shown that the 0° domain wall is a transitional state between the homogeneously magnetized media and the electric-field–induced magnetic domain. The critical field of the domain nucleation obtained from this model is within the range of experimental values of several MV/cm.
PACS: 75.85.+t – Magnetoelectric effects, multiferroics / 77.55.Nv – Multiferroic/magnetoelectric films
© EPLA, 2020
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