Synthesis and characterization of Bi_(0.85-x)Nd_(0.15)Ba_xFeO_3 (x = 0.00 and 0.15) ceramics

摘要

Polycrystalline ceramics Bi_(0.85-x)Nd_(0.15)Ba_xFeO_3 (x=0.00 and 0.15) were prepared via solid state mechanism technique. For further investigation of crystal structure, X-Ray diffraction patterns were recorded at room temperature (RT) and were refined by Rietveld analysis using Full prof suite. Rietveld refinement confirmed presence of rhombohedral symmetry with R3c space group in both the samples. Small values of R_P, R_(wp) factors and χ~2 exhibited good consistency in the experimental and simulated intensities. ε' and tanδ confirms dispersion behaviour at lower frequencies for various temperatures in both the samples. For 15% Ba and Nd substitution simultaneously, ε′ reduces significantly and become f-stable. Magnetic characterizations were carried out at RT upto a field of 5 kOe. Magnetic hysteresis loop revealed increase in magnetization as content of Ba increases from x=0.00 to x=0.15. A remnant magnetization M_r=13.15 memu/g and corecieve field H_c=2.08 kOe were observed in the ceramic Bi_(0.85)Nd_(0.15)Ba_(0.15)FeO_3.