Multiferroid properties of hexagonal barium ferrites

Resumo

Samples of BaFe₁₂O₁₉ with high multiferroid properties at room temperature (maximum polarization P_m = 48.0–9.5 μQ/cm², residual polarization P_r = 28.0–29.5 μQ/cm², and electric coercive field Е_c = 115–120 kV/m) have been obtained for the first time using a modified ceramic technology (based on highpurity raw materials and sintering in an oxygen atmosphere with a B₂O₃ addition). A mechanism for the explanation of the multiferroid properties obtained has been suggested; the large practical importance of the results obtained is noted.