Structural, electrical and magnetic properties of Bi{sub 0.825}Pb{sub 0.175}FeO{sub 3}, and Bi{sub 0.725}La{sub 0.1}Pb{sub 0.175}FeO{sub 3} multiferroics
- Materials Science Laboratory, School of Physics, Devi Ahilya University, Khandwa Road Campus, Indore 452001 (India)
- Laser Material Development and Devices Division, Raja Ramanna Centre for Advanced Technology, Indore 452013 (India)
Graphical abstract: - Highlights: • Samples synthesized by solid state reaction route successfully. • La and Pb substitutions significantly change the BiFeO{sub 3} crystal symmetry. • The presence of E(TO9) and E(LO9) modes indicates ferroelectric domain of BiFeO{sub 3}. • Doped ions and crystal structure affect the dielectric properties of the samples. • The observed value of conductivity for BPFO sample is 3.1 × 10{sup −9} σ{sup −1} cm{sup −1}. - Abstract: Single-phase BiFeO{sub 3}, Bi{sub 0.825}Pb{sub 0.175}FeO{sub 3} and Bi{sub 0.725}La{sub 0.1}Pb{sub 0.175}FeO{sub 3} ceramic samples were prepared via solid state reaction route to study the effects of co-doping (La/Pb) on their crystal structure and ferroelectromagnetic behaviour. X-ray diffraction data accompanied by Rietveld refinement showed that BiFeO{sub 3} crystallize in rhombohedral distorted perovskite structure (space group-R3c) while to that BPFO and BLPFO crystallize in tetragonal (P4/mmm) symmetry. Presence of E(TO9) and E(LO9) modes in Raman scattering spectra for BiFeO{sub 3} and Bi{sub 0.725}La{sub 0.1}Pb{sub 0.175}FeO{sub 3} infers ferroelectric nature. However, absence of both modes in Bi{sub 0.875}Pb{sub 0.175}FeO{sub 3} indicates the paraelectric nature. The room temperature dielectric constant (10 Hz–1 MHz) of BiFeO{sub 3}, Bi{sub 0.825}Pb{sub 0.175}FeO{sub 3} and Bi{sub 0.725}La{sub 0.1}Pb{sub 0.175}FeO{sub 3} is about 100, 60, and 200. Ferroelectromagnetic measurements revealed the existence of ferroelectricity with remnant polarization of 0.24 μC/cm{sup 2} in Bi{sub 0.725}La{sub 0.1}Pb{sub 0.175}FeO{sub 3}, paraelectricity in Bi{sub 0.875}Pb{sub 0.175}FeO{sub 3}, and weak (strong) ferromagnetism with remnant magnetizations of 0.25 (1.57) emu/g in Bi{sub 0.725}La{sub 0.1}Pb{sub 0.175}FeO{sub 3} (Bi{sub 0.825}Pb{sub 0.175}FeO{sub 3})
- OSTI ID:
- 22341844
- Journal Information:
- Materials Research Bulletin, Vol. 49; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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