Structural, Microstructural and Magnetic Properties of the High-Energy Ball Milled BiFeO_3 and BiFe_(0.95)Mn_(0.05)O_3 Ferroelectromagnetic Compounds

摘要

Multiferroic BiFeO_3 ceramic powders were synthesized through high-energy ball milling. The structural, micro structural and magnetic properties of the obtained samples were carefully determined. The obtained samples were very fractured and strained due to the employed milling conditions, motivating the agglomeration of the nanopowders. The unit cell, Mossbauer and magnetic parameters presented considerable alterations in comparison with those for bulk materials, as a consequence of mechanosynthesis. The modification of BiFeO_3 with 5 mol percent of Mn ions do not induces significant microstruc-tural or structural alterations in as-milled or annealed samples. However, an intense magnetization decreasing was observed.