Electrical and Magnetic Properties of Mn-Doped BiFeO₃ Nanomaterials

Abstract

Multiferroic Bismuth Ferrite (BiFeO₃ or BFO) is one of the promising lead-free multifunctional materials for device applications. In this work, we fabricate bismuth ferrite and manganese doped bismuth ferrite (BiFe_1−xMn_xO₃, x = 0.1, x = 0.2, up to 20%) nanoparticles by a modified sol-gel processing technique. The variation of dielectric constant ($\epsilon$) and loss tangent (tanδ) as a function of frequency at room temperature were investigated and ac conductivity was also calculated. The magnetic properties were also investigated and analyzed from vibrating sample magnetometer(VSM) data. The overall magnetic and electrical properties of the BFO ceramic samples were improved with Mn doping.

Keywords:

• Multiferroic
• sol-gel
• dielectric constant

Acknowledgements

The authors are very grateful to the Central Instrumentation Facilities, IIT Gauhati for the VSM measurement and the Department of physics Manipur University for SEM and XRD facilities. And one of the authors, A. Deepak Sharma, is very thankful to DST- INSPIRE for providing fellowship for full-time Ph.D. program.