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Synthesis and Thermal, Structural, Dielectric, Magnetic and Magnetoelectric Studies of BiFeO 3 ‐MgFe 2 O 4 Nanocomposites
Author(s) -
Singh Hemant,
Yadav Kanhaiya Lal
Publication year - 2015
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.13316
Subject(s) - materials science , dielectric , nanocomposite , annealing (glass) , ferrite (magnet) , spinel , differential thermal analysis , dielectric loss , calcination , analytical chemistry (journal) , magnetization , nuclear magnetic resonance , diffraction , magnetic field , composite material , metallurgy , chemistry , optics , optoelectronics , physics , chromatography , quantum mechanics , biochemistry , catalysis
Spinel–perovskite magnetoelectric (ME) nanocomposites x MgFe 2 O 4 –(1− x ) BiFeO 3 , x  =   0.1, 0.2, 0.3, and 0.4 were synthesized by sol‐gel method and characterized by differential thermal analysis, X‐ray diffraction analysis, dielectric and magnetic measurements. The samples were calcined at various temperatures and then the effect of annealing temperature on structural and magnetic properties was studied. From transmission electron microscopy, the average crystal size was found to be 30–50 nm. The magnetic behavior is found to be dependent on annealing temperature and magnesium ferrite content. The dielectric behavior with frequency and temperature has been modified with the induction of magnesium ferrite. The relative change of dielectric constant with magnetic field was observed in the nanocomposites. This relative change of magnetic field‐induced dielectric constant can also be expressed by Δε ~ γ M 2 (where γ is magnetoelectric coupling coefficient).

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