Synthesis of Yttrium and Cobalt Doped Bismuth Ferrite Nanoparticles for Electrical and Magnetic Properties

Abstract

A series of Yttrium (Y) and Cobalt (Co) co-doped bismuth ferrite (BFO) ceramics (Bi_1-xY_xFe_1-yCo_yO₃) were fabricated by sol-gel method. The precursors used are [Bi(NO₃)₃.5H₂O], [Fe(NO₃)₃.9H₂O], [Y(NO₃)₃.6H₂O] and [Co(NO₃)₂.6H₂O]. X-ray diffraction (XRD) pattern confirms the formation of the pure phase bismuth ferrite (BFO) after annealing at 600 $°$ C for 2 hrs. The chemical bonding between Fe-O and Bi-O were identified by Fourier Transform Infrared Spectroscopy (FTIR) analysis. The electric polarization, magnetic properties and dielectric properties of the doped samples were enhanced with increasing content of Y and Co.

Keywords:

• Multiferroic materials
• FTIR
• magneto dielectric coefficient

Acknowledgements

One of the authors, Huidrom Hemanta Singh is thankful to CSIR, New Delhi for providing financial assistance as JRF student (09/476(0079)/2017-EMR-I). The author is thankful to the Department of Physics, Manipur University for extending the valuable facilities for taking XRD and Dielectric measurements. He also thankful to Central Instrumentation facility (CIF), IIT Guwahati for VSM measurement and Delhi University for P-E loop measurements.