Effect of Ba Substitution on the Structural and Magnetic Properties of BiFeO&amp;lt;sub&amp;gt;3&amp;lt;/sub&amp;gt;

V Srinivas,A T Raghavender,K Vijaya Kumar

doi:10.4236/wjnse.2016.61004

Effect of Ba Substitution on the Structural and Magnetic Properties of BiFeO&lt;sub&gt;3&lt;/sub&gt;

V Srinivas, A T Raghavender + Show 1 more

Open Access

https://doi.org/10.4236/wjnse.2016.61004

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Abstract

Bi1-xBaxFeO3 (0 ≤ x ≤ 0.3) nanopowders were synthesized using sol-gel technique. The structural and magnetic properties were investigated using X-ray diffraction, SEM and VSM. As Ba2+ doping concentration was increased, the structure of the samples changed from rhombohedral to tetragonal or monoclinic. The structural change might be an important factor for achieving the ferroelectric properties in this material. The lattice parameters were observed to increase with increase in Ba2+ concentration. All the M-H loops showed the ferromagnetic behavior. Magnetization was observed to enhance with increase in Ba concentration. The enhancement in the magnetization due to Ba2+ doping may be due to the replacement of Bi3+ ions by Ba2+ which might have resulted in the suppression of spiral spin structure.

Highlights

BiFeO3 (BFO) multiferroic materials in nano, bulk and in thin film form have been extensively investigated since the last decade
Room temperature ferromagnetic properties of rare earth, transition metal ions doped BFO materials were observed by several researchers
The separation between (104) and (110) diffraction peaks are reduced with Ba substitution which may imply that rhombohedral structure might have distorted to either tetragonal or monoclinic structure [19]

Summary

Introduction

BiFeO3 (BFO) multiferroic materials in nano, bulk and in thin film form have been extensively investigated since the last decade. Room temperature ferromagnetic properties of rare earth, transition metal ions doped BFO materials were observed by several researchers. Several researchers have attempted to prepare BFO using different synthesis techniques and yet the secondary phases are difficult to avoid, but the defects related to the oxygen vacancies have been reduced [13]. In this present work, we intend to investigate and present the results of the structural and magnetic changes taking place with Ba2+ doping in BFO

Experimental

Results and Discussions

Conclusion