Abstract
In this paper, we investigate the behavior of 2D ferromagnetic (FM) films on a ferroelectric (FE) substrate with a periodic structure. The two-dimensional Frenkel–Kontorova (FK) potential simulates the substrate effect on the film. The substrate potential corresponds to a cubic crystal lattice. The Ising model and the Wolf cluster algorithm are used to describe the magnetic behavior of a FM film. The effect of an electric field on a FE substrate leads to its deformation, which is uniform and manifests itself in a period change of the substrate potential. Computer simulation shows that substrate deformations lead to a decrease in the FM film Curie temperature. If the substrate deformations exceed 5%, the film deformations become inhomogeneous. In addition, we derive the dependence of film magnetization on the external electric field.
Highlights
Transition and Magnetoelectric EffectA wide range of spintronic devices uses the magnetoelectric (ME) effect in two-layer systems
The deformation of the FE substrate occurs in an external electric field
Film deformation due to magnetostrictive phenomena leads to a shift in the Curie temperature
Summary
A wide range of spintronic devices uses the magnetoelectric (ME) effect in two-layer systems. The ME effect allows controlling magnetization with an external electric field. In turn, allows managing the conductivity of the system due to the phenomenon of giant magnetoresistance. A giant ME effect occurs in systems consisting of a thin FM film deposited on a FE substrate. One of the ME effect appearance mechanisms in such systems shows up due to the shift in the Curie point in the FM film under the substrate influence. The deformation of the FE substrate occurs in an external electric field. The film is deformed due to the interaction of the atoms of the film and the substrate. Film deformation due to magnetostrictive phenomena leads to a shift in the Curie temperature
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