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Magnetoelectric Properties of NdxBi1-xFeO3 Thin Films

Multiferroics based on BiFeO3 with spatially-modulated antiferromagnetic structure are investigated. The goal of this work is to define possibility of orientation phase transitions in magnetic and electric system by replacing Bi with 4f Nd ion depending on temperature in external magnetic field. On NdxBi1-xFeO3 films the measurements of permittivity, loss tangent at frequences 100 Hz < ω < 105 Hz and at temperatures 300 К < T < 1000 K without magnetic field and in magnetic field with H=0.8 Т were made. A drop in temperature dependence of permittivity in magnetic field was found. Magnetoelectric properties can be explained in model of changing of magnetic structure in magnetic field as a result of interaction of electric and magnetic subsystems.