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Size dependent magnetic and electrical properties of Ba-doped nanocrystalline BiFeO3.

Authors :
Hasan, Mehedi
Hakim, M. A.
Basith, M. A.
Hossain, Md. Sarowar
Ahmmad, Bashir
Zubair, M. A.
Hussain, A.
Islam, Md. Fakhrul
Source :
AIP Advances. 2016, Vol. 6 Issue 3, p1-13. 13p.
Publication Year :
2016

Abstract

Improvement in magnetic and electrical properties of multiferroic BiFeO3 in conjunction with their dependence on particle size is crucial due to its potential applications in multifunctional miniaturized devices. In this investigation, we report a study on particle size dependent structural, magnetic and electrical properties of sol-gel derived Bi0.9Ba0.1FeO3 nanoparticles of different sizes ranging from ~ 12 to 49 nm. The substitution of Bi by Ba significantly suppresses oxygen vacancies, reduces leakage current density and Fe2+ state. An improvement in both magnetic and electrica properties is observed for 10% Ba-doped BiFeO3 nanoparticles compared to its undoped counterpart. The saturation magnetization of Bi0.9Ba0.1FeO3 nanoparticles increase with reducing particle size in contrast with a decreasing trend of ferroelectric polarization. Moreover, a first order metamagnetic transition is noticed for ~ 49 nm Bi0.9Ba0.1FeO3 nanoparticles which disappeared with decreasing particle size. The observed strong size dependent multiferroic properties are attributed to the complex interaction between vacancy induced crystallographic defects, multiple valence states of Fe, uncompensated surface spins, crystallographic distortion and suppression of spiral spin cycloid of BiFeO3. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
21583226
Volume :
6
Issue :
3
Database :
Academic Search Index
Journal :
AIP Advances
Publication Type :
Academic Journal
Accession number :
114309997
Full Text :
https://doi.org/10.1063/1.4944817