Enhancing ferromagnetic properties in bismuth ferrites with non-magnetic Y and Sc co-doping

Polycrystalline Bi 1 - x Y x Fe 0.97 Sc 0.05 O 3 ( x = 0 , 0.06, 0.12; y = 0.05 ) were prepared by solid-state method by high energy ball milling technique. X-ray diffraction studies confirm polycrystalline nature of the samples with rhombohedral perovskite structure (R3c: Space group). DTA confirms...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2018-03, Vol.29 (6), p.5150-5156
Main Authors: Jena, A. K., Mohanty, J.
Format: Article
Language:English
Subjects:
Bismuth
Bismuth ferrite
Characterization and Evaluation of Materials
Chemistry and Materials Science
Coercivity
Doping
Ferromagnetism
Magnetic fields
Magnetic measurement
Magnetic properties
Magnetism
Magnetization
Materials Science
Optical and Electronic Materials
Perovskite structure
Polycrystals
Spin structure
Thermal analysis
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Summary:Polycrystalline Bi 1 - x Y x Fe 0.97 Sc 0.05 O 3 ( x = 0 , 0.06, 0.12; y = 0.05 ) were prepared by solid-state method by high energy ball milling technique. X-ray diffraction studies confirm polycrystalline nature of the samples with rhombohedral perovskite structure (R3c: Space group). DTA confirms the successfully phase formation in all samples. Room temperature Raman measurements reveal that lattice distortions occur by insertion of Y and Sc at A and B-site of BFO respectively, which may improve the magnetic properties. UV–Visible analysis confirms small band gap tuning in doped BFO resulting in due to the change in Fe–O (bond length) and Fe–O–Fe (bond angle). Room temperature magnetic measurements reveal an improved magnetic properties with saturated magnetization ( M s = 4.503 emu/gm ) , remanent magnetization ( M r = 1.514 emu/gm ) , coercive field ( H c = 259.33 Oe ) for 12% doping concentration. Co-doping of Y and Sc leads to modification in the spiral modulated spin structure resulting in soft ferromagnetic behavior in contrast to G-type anti-ferromagnetic nature of the parent compound.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-017-8479-9