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Impact of (Pr, Dy) co-doping at Bi site on optical and multiferroic properties of BiFeO3 ceramics prepared by sonochemical method
Bismibanu A.1,2, Vanga Pradeep Reddy3,4,5, Alagar M.2,6, Selvalakshmi Thangaraj7, Shameem Banu I.B.8, Ashok M.5
1Department of Physics, The Standard Fireworks Rajarathnam College for Women, Sivakasi, India
2Center for Research and Post Graduate Studies in Physics, Ayya Nadar Janaki Ammal College, Sivakasi, Tamil Nadu, India
3Department of Physics, Vel Tech Rangarajan Dr. Sagunthala R &
4D Institute of Science and Technology, Chennai, Tamil Nadu, India
5New Generation Materials Laboratory, Department of Physics, National Institute of Technology, Tiruchirappalli, India
6Post Graduate Department of Physics, MannarThirumalai Naicker College, Madurai,, Tamil Nadu, India
7Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamil Nadu, India
8Department of Physics, B.S.Abdur Rahman Institute of Science and Technology, Vandalur, Chennai 600 048, Tamil Nadu, India
Email: physicsbismi@gmail.com
Поступила в редакцию: 11 мая 2021 г.
Выставление онлайн: 9 июля 2021 г.

A series of Pr and Dy were substitutued at Bi of BiFeO3 were synthesized by sonochemical method. keeping Pr at 5%, Dy composition was varied to obtain Bi0.95-xPr0.05DyxFeO3 (x=0.01, 0.03 and 0.05). The X-ray diffraction pattern and Rietveld refinement analysis reveals the rhombohedral structure for the co-doped BFO samples. The Diffuse Reflectance Spectra (DRS) exhibit bands in ultraviolet and visible region and the energy band gap values are in the range of 1.91 eV to 2.1 eV and gap increases with Dy increase. Our study shows that Pr and Dy dopants improved the ferroelectric and magnetic properties for low concentration of Dy indicating that they are good multiferroic materials. The excellent ferroelectric loops were recorded at the various electric fields. It was noted that the current leakage and the remnant magnetization is less for 5% Dy indicating that impact of the higher concentration of the Dy dopants. However, the lower content of Dy exhibited good results speculating the possibility of these materials for suitable applications. Keywords: Sonochemical, X-ray diffraction, Band gap, Ferroelectric, Leakage current density, Ferromagnetic.

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