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- W4313357583 abstract "Improper ferroelectrics are a class of materials with the potential to design multiferroic properties. In this paper, we report on the effect of defect dipoles on the ferromagnetic and ferroelectric properties of Ca3Mn2O7 improper ferroelectric thin films. Two kinds of defects dipoles, Mn3+-oxygen vacancy (Mn3+-VO∙∙) and Li+-Al3+ doping, were studied. The experimental results show that both Mn3+-VO∙∙ and Li+-Al3+ defect dipoles can introduce ferromagnetism in the films, and Li+-Al3+ defect dipole can also improve ferroelectricity with self-polarization. The first-principle calculations based on local density approximation demonstrate the local lattice distortion, including title MnO6 octahedron and off-center displacement of Mn ion, plays crucial role in multiferroic properties of the film. This work gives an effective method to design the ferroelectricity and ferromagnetic properties in improper ferroelectric oxides with layered structure through constructing defect dipoles." @default.
- W4313357583 created "2023-01-06" @default.
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- W4313357583 date "2023-05-01" @default.
- W4313357583 modified "2023-10-16" @default.
- W4313357583 title "Multiferroic properties induced by defect dipoles in thin Ca3Mn2O7 films at room temperature" @default.
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- W4313357583 doi "https://doi.org/10.1016/j.ceramint.2022.12.269" @default.
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