Fabrication and magnetization of Ca-doped BiFeO₃–BaTiO₃-tapes by powder in tube method

Abstract

Calcium doped bismuth ferrite (BiFeO₃, BFO)-barium titanate (BaTiO₃, BTO) powders were successfully synthesized by a facile sol–gel route. Subsequently as-synthesized powders were packed within a fugitive silver metal tube and formed into tapes with uniform thickness by means of cold drawing and rolling processes, which is called powder in tube (PIT) method. The influence of calcining temperature on the crystalline structure and characterization of BFO-based tape was also studied. The particle size of tape prepared by PIT method is becoming smaller, indicating PIT method has great effect on refined particle. Furthermore, the remanent magnetization 2Mr and coercive force Hc for the tape are 0.092 emu/g and 281.59Oe, respectively. The optimized calcining temperature for the tape is 400°C.