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Structure, ferroelectric and magnetic behavior in Mn doped 0.75 BiFeO3-0.25BaTiO3 ceramics by Md Kashif Shamim; Anand Ranjan; Santosh Kumar; Shekhar Kumar; Seema Sharma is a Materials Science article available to read on EtoBox.

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Lead-free polycrystalline 0.75 BiFe 1-xMn xO3-0.25BaTiO3 (x = 0.00, 0.01, 0.02 and 0.03 hereby designated as BF-BT) ceramics were synthesized by high temperature solid state reaction technique. This study dwells on the role of Mn doping on the structure, ferroelectric and magnetic behavior of BF-BT ceramics. Structural phase analysis of the samples carried out by X-ray diffraction and Raman scattering measurements revealed single phase distorted perovskite structure with rhombohedral symmetry. No alteration in crystal structure was observed with increasing Mn concentration. The average crystallite size of the compounds increases (12.9–27.8 nm) with increasing Mn concentration. The saturated value of ferroelectric polarization (Pr) was found to decrease with increasing Mn-concentration and a maximum remnant polarization (Pr) of 0.6 μC/cm2 was recorded at an applied field of 25 kV/cm for x = 0.00 sample. Leakage current density was found to increase with increase in Mn concentration. Oxidation states of the cations probed by X-ray photoelectron spectroscopy (XPS) suggested that Fe/Mn were in mixed state (+3/+2), while Ti-ion demonstrated (+3/+4) state. Presence of multivalence states

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Author

Md Kashif Shamim; Anand Ranjan; Santosh Kumar; Shekhar Kumar; Seema Sharma

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Materials Science (Physical Sciences)