Structure, optical and magnetic properties of new Bi0.5Na0.5TiO3- SrMnO3-δ solid solution materials

Dang Duc Dung; Nguyen The Hung; Dorj Odkhuu

doi:10.1038/s41598-019-54172-4

Structure, optical and magnetic properties of new Bi_0.5Na_0.5TiO₃- SrMnO_3-δ solid solution materials

Sci Rep. 2019 Dec 3;9(1):18186. doi: 10.1038/s41598-019-54172-4.

Authors

Dang Duc Dung¹, Nguyen The Hung^{2

3}, Dorj Odkhuu⁴

Affiliations

¹ Department of General Physics, School of Engineering Physics, Ha Noi University of Science and Technology, 1 Dai Co Viet road, Ha Noi, Viet Nam. dung.dangduc@hust.edu.vn.
² Department of General Physics, School of Engineering Physics, Ha Noi University of Science and Technology, 1 Dai Co Viet road, Ha Noi, Viet Nam.
³ Department of Physics, Faculty of Basic and Fundamental Sciences, Viet Nam Maritime University, 484, Lach Tray street, Hai Phong city, Viet Nam.
⁴ Department of Physics, Incheon National University, Incheon, 22012, Republic of Korea. odkhuu@inu.ac.kr.

Abstract

The new Bi_0.5Na_0.5TiO₃-SrMnO_3-δ solid solution materials were fabricated via sol-gel method. The random incorporation of Sr and Mn cations into host lattice of Bi_0.5Na_0.5TiO₃ resulted in structural distortion and influenced on the reduction of the optical band gap from 3.07 eV to 1.81 eV for pure Bi_0.5Na_0.5TiO₃ and 9 mol% SrMnO_3-δ solid solution into Bi_0.5Na_0.5TiO₃. The magnetic properties of Bi_0.5Na_0.5TiO₃ materials at room temperature were tuned via compensation of diamagnetic material with weak-ferromagnetism to ferromagnetism with low SrMnO_3-δ content and combination of paramagnetism/antiferromagnetism-like and ferromagnetism with higher SrMnO_3-δ content solid solution in Bi_0.5Na_0.5TiO₃. The tunable magnetic and optical properties of lead-free ferroelectric materials was promising for their application to green electronic devices.