Structural, Optical and Magnetic Properties of (1- x)Bi0.5Na0.5TiO₃+ x BaCoO3- δ Solid Solution Systems Prepared by the Sol-Gel Method

Dang Duc Dung; Nguyen The Hung

doi:10.1166/jnn.2021.19090

Structural, Optical and Magnetic Properties of (1- x)Bi_0.5Na_0.5TiO₃+ x BaCoO_{3- δ} Solid Solution Systems Prepared by the Sol-Gel Method

J Nanosci Nanotechnol. 2021 Apr 1;21(4):2604-2612. doi: 10.1166/jnn.2021.19090.

Authors

Dang Duc Dung¹, Nguyen The Hung¹

Affiliation

¹ Department of General Physics and Multifunctional Ferroics Materials Lab., Ha Noi University of Science and Technology, Ha Noi, 100000, Viet Nam.

PMID: 33500082
DOI: 10.1166/jnn.2021.19090

Abstract

A new solid solution, (1-x)Bi_0.5Na_0.5TiO₃+xBaCoO_3-δ materials, was fabricated using the sol-gel method. X-ray diffraction showed that the crystal structure of the compound exhibited rhombohedral symmetry and is similar to the crystal structures of host Bi_0.5Na_0.5TiO₃ materials. Distortions in the structures and reduction in the optical band gaps of the Bi_0.5Na_0.5TiO₃ materials were possibly due to the random incorporation of Ba and Co cations into host lattice materials. The magnetic properties of the Bi_0.5Na_0.5TiO₃ materials were tuned by controlling the concentrations of BaCoO_3-δ as the solid solution. We expect that our work will provide valuable information on current methods for integrating ferromagnetic properties into lead-free ferroelectric materials for the development of multiferroic materials.