Enhanced magnetodielectric properties of single-phase Bi0.95−xLa0.05LuxFeO3 multiferroic system

Polycrystalline samples of single-phase co-doped (La3+, Lu3+) in Bi0.95−xLa0.05LuxFeO3 (x=0.03, 0.05 and 0.07) (grain size ∼0.5μm; tolerance factor ∼0.88) were prepared by solid state reaction of oxides, followed by rapid quenching of samples. Magnetic measurements show weak ferromagnetic-antiferrom...

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Bibliographic Details
Published in:Journal of alloys and compounds 2013-03, Vol.554, p.138-141
Main Authors: Kumar, Amit, Yadav, K.L.
Format: Article
Language:English
Subjects:
Alloys
Ceramics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Distortion
Exact sciences and technology
Ferromagnetism
Grain size
Magnetic properties
Magnetic properties and materials
Magnetization
Magnetomechanical and magnetoelectric effects, magnetostriction
Oxides
Physics
Rapid-solidification
Tolerances
X-ray diffraction
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Summary:Polycrystalline samples of single-phase co-doped (La3+, Lu3+) in Bi0.95−xLa0.05LuxFeO3 (x=0.03, 0.05 and 0.07) (grain size ∼0.5μm; tolerance factor ∼0.88) were prepared by solid state reaction of oxides, followed by rapid quenching of samples. Magnetic measurements show weak ferromagnetic-antiferromagnetism (WFM) nature at room temperature but ferromagnetic nature at ∼5K. Field cooled curves reveal spin reorientation in the system at lower temperature as shown by the peaks at ∼145 and ∼140K for x=0.03 and 0.07, respectively. Dielectric measurement shows relaxor type of phase transition for x=0.07. The magnetocapacitance was found to be enhanced (∼3 times than that of BiFeO3) due to co-doping of (La3+, Lu3+) in BiFeO3 ceramic showing the coupling effect between magnetic and electric behaviors which occurs through the lattice distortion.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2012.11.189