Structure, optical and magnetic properties of new Bi(0.5)Na(0.5)TiO(3)- SrMnO(3−δ) solid solution materials

The new Bi(0.5)Na(0.5)TiO(3)-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(0.5)Na(0.5)TiO(3) 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(0.5)Na(0.5)TiO(3) and 9 mol% SrMnO(3−δ) solid solution into Bi(0.5)Na(0.5)TiO(3). The magnetic properties of Bi(0.5)Na(0.5)TiO(3) 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(0.5)Na(0.5)TiO(3). The tunable magnetic and optical properties of lead-free ferroelectric materials was promising for their application to green electronic devices.