Determining the relaxation polarization parameters in dielectrics with high electrical conductivity

Bogatin, A. S.; Andreev, E. V.; Kovrigina, S. A.; Ignatova, Yu. A.; Bulanova, A. L.; Bogatina, V. N.

doi:10.3103/s1062873815060040

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“…This indicates the presence of dielectric dispersion in the material. When measured in weak electric fields, the sample under study, taking into account the differences in the characteristics of SBN and BFO, should be considered as a two-layer Maxwell-Wagner capacitor [12] with the following dispersion of the complex permittivity [13]:…”

Section: Resultsmentioning

confidence: 99%

Preparation, structural features, elemental composition of and dielectric properties of a two-layer structure based on thin films of multiferroic BiFeO-=SUB=-3-=/SUB=- and ferroelectric (Sr, Ba)Nb-=SUB=-2-=/SUB=-O-=SUB=-6-=/SUB=-

Pavlenko

Stryukov

et al. 2022

Physics of the Solid State

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BiFeO heterostructures were manufactured using intermittent sputtering technology on the surface of a single crystal substrate MgO(001) BiFeO3/(Sr, Ba)Nb2O6. Studies of the structure, thickness profile of the composition, surface morphology and dielectric characteristics of materials have been carried out. It is established that despite the formation of two types of orientation domains (±18.4o) in the layer (Sr, Ba)Nb2O6, the upper layer of BiFeO3 is in the ratio of the total parallel orientation with the substrate MgO(001). It is shown that the composition of the films of bismuth ferrite and barium-strontium niobate does not change in film thickness, corresponds to the compositions of the sprayed ceramic targets, no signs of the presence of buffer layers were revealed. The results of the study of dielectric and ferroelectric characteristics of the heterostructure are presented. The reasons for the revealed patterns are discussed. Keywords: thin films, heterostructure, barium-strontium niobate, bismuth ferrite.

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Section: Resultsmentioning

confidence: 99%