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Title: 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}

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}.
Authors:
; ;  [1] ; ;  [2] ; ;  [3]
  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)
Publication Date:
OSTI Identifier:
22273658
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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