Effects of (La, Sr) co-doping on electrical conduction and magnetic properties of BiFeO3 nanoparticles

doi:10.1088/1674-1056/25/9/097801

Abstract Multiferroic material as a photovoltaic material has gained considerable attention in recent years. Nanoparticles (NPs) La_0.1Bi_0.9-xSr_xFeO_y (LBSF, x=0, 0.2, 0.4) with dopant Sr²⁺ ions were synthesized by the sol-gel method. A systematic change in the crystal structure from rhombohedral to tetragonal upon increasing Sr doping was observed. There is an obvious change in the particle size from 180 nm to 50 nm with increasing Sr substitution into LBFO. It was found that Sr doping effectively narrows the band gap from ～2.08 eV to ～1.94 eV, while it leads to an apparent enhancement in the electrical conductivity of LBSF NPs, making a transition from insulator to semiconductor. This suggests an effective way to modulate the conductivity of BiFeO₃-based multiferroic materials with pure phase by co-doping with La and Sr at the A sites of BiFeO₃.

Keywords: BiFeO₃ doping conductivity magnetic properties

Received: 14 January 2016
Revised: 25 May 2016
Accepted manuscript online:

PACS:	78.67.Bf	(Nanocrystals, nanoparticles, and nanoclusters)
	77.84.-s	(Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)
	75.75.-c	(Magnetic properties of nanostructures)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11104202 and 51572193).

Corresponding Authors: Shouyu Wang
E-mail: shouyu.wang@yahoo.com

Cite this article:

Li Liu(刘莉), Shouyu Wang(王守宇), Zi Yin(殷子), Weifang Liu(刘卫芳), Xunling Xu(徐训岭), Chuang Zhang(张闯), Xiu Li(李秀), Jiabin Yang(杨佳斌) Effects of (La, Sr) co-doping on electrical conduction and magnetic properties of BiFeO₃ nanoparticles 2016 Chin. Phys. B 25 097801

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Effects of (La, Sr) co-doping on electrical conduction and magnetic properties of BiFeO3 nanoparticles

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Effects of (La, Sr) co-doping on electrical conduction and magnetic properties of BiFeO₃ nanoparticles