Effect of Pr- and Nd- doping on structural, dielectric, and magnetic properties of multiferroic Bi{sub 0.8}La{sub 0.2}Fe{sub 0.9}Mn{sub 0.1}O{sub 3}

Journal Article · Mon Apr 07 04:00:00 EDT 2014 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4870454· OSTI ID:22273658

Singh, Rahul; Shahi, P.; Chatterjee, Sandip ^[1]; Dwivedi, G. D.; Ghosh, A. K. ^[2]; Kumar, D.; Prakash, Om ^[3]

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1. Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005 (India)
2. Department of Physics, Banaras Hindu University, Varanasi 221005 (India)
3. Department of Ceramic Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005 (India)

Bi{sub 0.8}La{sub 0.15}RE{sub 0.05}Fe{sub 0.9}Mn{sub 0.1}O{sub 3} (where RE = Pr and Nd) have been prepared via conventional solid state route. The Rietveld refinement of X-ray diffraction patterns shows that both systems crystallize in orthorhombic Pnma space group. Raman modes observed for these two systems indicate that both systems are very close to orthorhombic Pnma structure. Appearance of prominent A{sub 1}-3 and weak E-2 modes in Bi{sub 0.8}La{sub 0.15}Nd{sub 0.05}Fe{sub 0.9}Mn{sub 0.1}O{sub 3} indicate the presence of chemically more active Bi-O covalent bonds (which favors stereochemical activity of Bi lone pair electrons) in comparison to Bi{sub 0.8}La{sub 0.15}Pr{sub 0.05}Fe{sub 0.9}Mn{sub 0.1}O{sub 3}. Moreover, Bi{sub 0.8}La{sub 0.15}Nd{sub 0.05}Fe{sub 0.9}Mn{sub 0.1}O{sub 3} system shows higher dielectric constant, low dielectric loss, and higher magnetization value in comparison to Bi{sub 0.8}La{sub 0.15}Pr{sub 0.05}Fe{sub 0.9}Mn{sub 0.1}O{sub 3} system. Ferroelectric transition temperature decreases to 460 °C for both systems in comparison to 710 °C of Bi{sub 0.8}La{sub 0.2}Fe{sub 0.9}Mn{sub 0.1}O{sub 3}. The improved dielectric and magnetic response suggests Bi{sub 0.8}La{sub 0.15}Nd{sub 0.05}Fe{sub 0.9}Mn{sub 0.1}O{sub 3} a better multiferroic system than Bi{sub 0.8}La{sub 0.15}Pr{sub 0.05}Fe{sub 0.9}Mn{sub 0.1}O{sub 3}.

• OSTI ID: 22273658
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 13 Vol. 115; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BISMUTH COMPOUNDS
CHEMICAL BONDS
COMPARATIVE EVALUATIONS
ELECTRONS
FERROELECTRIC MATERIALS
IRON COMPOUNDS
LANTHANUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANATES
NEODYMIUM COMPOUNDS
ORTHORHOMBIC LATTICES
PERMITTIVITY
PRASEODYMIUM COMPOUNDS
RAMAN SPECTRA
RELAXATION LOSSES
TRANSITION TEMPERATURE
X-RAY DIFFRACTION