Size dependent magnetic and electrical properties of Ba-doped nanocrystalline BiFeO{sub 3}

Journal Article · Tue Mar 15 04:00:00 EDT 2016 · AIP Advances

DOI:https://doi.org/10.1063/1.4944817· OSTI ID:22611632

Hasan, Mehedi; Hakim, M. A.; Zubair, M. A.; Hussain, A.; Islam, Md. Fakhrul ^[1]; Hossain, Md. Sarowar ^[2]; Ahmmad, Bashir ^[3]

---

1. Department of Glass and Ceramic Engineering, Bangladesh University of Engineering and Technology, Dhaka 1000 (Bangladesh)
2. S. N. Bose National Centre for Basic Sciences, Salt Lake City, Kolkata, West Bengal 700098 (India)
3. Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa 992-8510 (Japan)

Improvement in magnetic and electrical properties of multiferroic BiFeO{sub 3} 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 Bi{sub 0.9}Ba{sub 0.1}FeO{sub 3} 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 Fe{sup 2+} state. An improvement in both magnetic and electrical properties is observed for 10 % Ba-doped BiFeO{sub 3} nanoparticles compared to its undoped counterpart. The saturation magnetization of Bi{sub 0.9}Ba{sub 0.1}FeO{sub 3} 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 Bi{sub 0.9}Ba{sub 0.1}FeO{sub 3} 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 BiFeO{sub 3}.

• OSTI ID: 22611632
• Journal Information: AIP Advances, Journal Name: AIP Advances Journal Issue: 3 Vol. 6; ISSN AAIDBI; ISSN 2158-3226
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM ADDITIONS
BISMUTH COMPOUNDS
CRYSTALLOGRAPHY
CRYSTALS
CURRENT DENSITY
DEFECTS
DOPED MATERIALS
ELECTRICAL PROPERTIES
FERRITES
FERROELECTRIC MATERIALS
INTERACTIONS
LEAKAGE CURRENT
MAGNETIZATION
NANOPARTICLES
NANOSTRUCTURES
POLARIZATION
SATURATION
SOL-GEL PROCESS
SPIN
VACANCIES