SYNTHESIS, STRUCTURE AND PROPERTIES OF THE Nd,Mn- SUBSTITUTED MULTIFERROICS SOLID SOLUTIONS BASED ON THE PEROVSKITE BISMUTH FERRITE
The ceramic samples of Bi0.85Nd0.15FeO3, BiFe0.85Mn0.15O3, and Bi0.85Nd0.15Fe0.85Mn0.15O3 solid solutions were synthesized, their lattice constants were determined, and their microstruc- ture, thermal expansion, magnetic susceptibility, magnetic moment, electrical conductivity, and thermo-EMF were stud- ied. It was found that Bi0.85Nd0.15FeO3 and BiFe0.85Mn0.15O3 had rhombohedrally, but Bi0.85Nd0.15Fe0.85Mn0.15O3 - orthorhom- bically distorted perovskite structure and are antiferromag- netic p-type semiconductors, which electrical resistivity val- ues are smaller than for unsubstituted bismuth ferrite, Neel temperature and thermo-EMF coefficient sharply decreased at partial substitution of iron by manganese, and linear ther- mal expansion coefficient varied within (10.0-13.4)·10-6 K-1