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A Novel Approach to Improve Properties of BiFeO 3 Nanomultiferroics
Author(s) -
Arya Ghanshyam,
Kotnala Ravinder K.,
Negi Nainjeet Singh
Publication year - 2014
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12782
Subject(s) - materials science , crystal structure , condensed matter physics , perovskite (structure) , ferromagnetism , saturation (graph theory) , lattice (music) , thermal conduction , analytical chemistry (journal) , crystallography , chemistry , physics , chromatography , combinatorics , acoustics , mathematics , composite material
In this study we report the synthesis of Bi 1− x In x Fe 1− y Ti y O 3 (0 ≤ x ≤ 0.1, 0 ≤ y ≤ 0.05) nanoparticles by a simple cost effective solution combustion method. Pure BFO samples shows distorted rhombohedral perovskite structure with space group R 3 c which is also supported by Fourier transform infrared spectra study. The codoping of In and Ti at A–B sites of BFO ( BIFTO ) partially distorts the crystal structure, increases the lattice strain, reduces the average particle size (14 nm), and increases the Fe 3+ / Fe 2+ ratio which significantly affect the observed results. The saturation magnetization increases significantly upon codoping (4.60 emu/gm) by about 12 times than that of pure BFO (0.4 emu/gm). The improved ferromagnetic properties upon codoping is further manifestated in large value of linear magnetoelectric coupling coefficient (4.8 mV/cmOe) which further provides an indirect evidence for the collapse of space modulated spin structure. The activation energy increases with codoping (0.68 eV), although less than 1 eV which indicates that the conduction is still dominated by charged defects.