Study Of A-site Divalent Doping On Multiferroic Properties Of BFO Nanoparticles Processed Via Combustion Method

Baljinder Kaur1,2,3, Lakhbir Singh1,2,3, V. Annapu Reddy4, Dae-Yong Jeong5 , Navneet Dabra6*, Jasbir S. Hundal2

1Yadvindra College of Engineering, Punjabi University Guru Kashi Campus, Talwandi Sabo 151302, Punjab, India

2Materials Science Laboratory, Department of Applied Physics, Giani Zail Singh Campus College of Engineering & Technology, Maharaja Ranjit Singh Punjab Technical University, Bathinda 151001, Punjab, India

3Research Scholar of I.K. Gujral Punjab Technical University, Near Pushpa Gujral Science City, Kapurthala 144603, Punjab, India

4Functional Ceramics Research Group, Korea Institute of Materials Science (KIMS), Gyeoungnam 641831, Korea

5Department of Materials Science and Engineering, Inha University, Incheon 402751, Korea

6Mata Sahib Kaur Girls’ College (affiliated to Punjabi University Patiala), Talwandi Sabo 151302, Punjab, India

Adv. Mater. Lett., 2016, 7 (12), pp 1015-1020

DOI: 10.5185/amlett.2016.6457

Publication Date (Web): Oct 12, 2016

E-mail:navneetdabra@gmail.com

Abstract


Pure and Sr?doped bismuth ferrite Bi1-xSrx FeO3 (x = 0, 0.1, 0.2, 0.3) nanoparticles have been synthesized using combustion method. X- Ray diffraction study of these compounds confirms the rhombohedral structure with R3c space group. BiFeO3 peaks were observed at 2θ = 22.46o, 31.80o, 32.11o, 39.519o, 45.79o, 51.35o, 56.98o and 57.16o having miller indices as (012), (104), (110), (202), (024), (116), (214) respectively. The traces of secondary phase also appear along with desired phase of Sr?doped bismuth ferrite Bi1-xSrxFeO3 samples. The scanning electron microscopy of fractured pellets of the samples reveals the decrease in grain size with increase of Sr doping in Bi1-xSrxFeO3. Magnetic studies were carried out at room temperature up to a field of 10 kOe. M-H hysteresis loops showed a significant increase in magnetization with Sr substitution in BiFeO3. Compared to weak magnetisation with magnetizing field (M-H) shown by BiFeO3 nanoparticles (Remnant magnetization, Mr ~ 0.4x10-3 emu/g and coercive field, Hc ~ 0.065 kOe respectively), a significant enhancement in M-H loop was observed in Bi1-xSrx FeO3 compounds. The value of Mr ~ 0.525 emu/g and Hc ~ 3.70 kOe have been found to be maximum for x = 0.30 in Bi1-xSrx FeO3 compounds. Leakage current studies showed decrease in leakage current density of doped samples to that of pure BiFeO3 and x = 0.10 gives minimum value of 4.78 x 10-6 A/cm2 at 350 V/cm. The ferroelectric nature was confirmed by observed P-E loops in all the samples.

Keywords

BiFeO3, multiferroic, combustion method, XRD, SEM, VSM.

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