Preparation and Studies on (1-x) BiFeO3–x Li0.5Fe2.5O4 (x=0.25 And 0.5) multiferroic nano-composites 

Samar Layek, Soumen Kumar Bag and H. C. Verma*

Department of Physics, Indian Institute of Technology, Kanpur 208016, India

Adv. Mater. Lett., 2013, 'ICNANO 2011', 4 (1), pp 26-30

DOI: 10.5185/amlett.2013.icnano.289

Publication Date (Web): Oct 14, 2012

E-mail: hcverma@iitk.ac.in

Abstract


Multiferroic nano-composite (1-x) BiFeO3–x Li0.5Fe2.5O4 (x=0.25 and 0.5) have been successfully synthesized by mixing the two phases, prepared independently by two different methods followed by annealing at 600 0C. Existence of the two phases in the composite is confirmed by x-ray diffraction pattern. Average particle size is calculated to be about 45 nm for both of these phases. The saturation magnetization, remnant magnetization and coercive field increases linearly with increasing ferromagnetic phase (Li0.5Fe2.5O4) as investigated by VSM measurement. Local magnetic behaviors have been investigated by 57Fe Mössbauer spectroscopic studies. Large dielectric constant of the order of 103-104 has been observed in these composites.

Keywords

BiFeO3, Li0.5Fe2.5O4, composite, multiferroic, VSM, 57Fe Mossbauer spectroscopy.

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