<p>Synthesis of four-layered Aurivillius compound doped with Nd³⁺ and Mn⁴⁺cations, SrBi_3.5Nd_0.5Ti_4-xMn_xO₁₅ (<em>x</em> = 0; 0.5; 1) was carried out using molten salt method with a mixture of Na₂SO₄/K₂SO₄ as a flux. The synthesized products were characterized using X-ray diffraction (XRD) and refined by <em>Le Bail</em> technique. The results of XRD analysis show that the four-layered Aurivillius compound formed, however there are additional peaks identified as perovskite and Bi_7.68Ti_0.32O_12.16  phases for <em>x</em> = 0 and perovskite and Sr₄Ti₃O₁₀phases for <em>x</em> = 0.5 and 1. The results of refinement show that four-layered Aurivillius phase formed has orthorhombic symmetry with <em>A2₁am</em> space group. Scanning Electron Microscopy (SEM) shows the plate like morphology that are characteristic of Aurivillius compound. Dielectric constant of the samples show increasing value as increasing of Mn⁴⁺ concentration.</p>

<p>Synthesis of four-layered Aurivillius compound doped with Nd³⁺ and Mn⁴⁺cations, SrBi_3.5Nd_0.5Ti_4-xMn_xO₁₅ (<em>x</em> = 0; 0.5; 1) was carried out using molten salt method with a mixture of Na₂SO₄/K₂SO₄ as a flux. The synthesized products were characterized using X-ray diffraction (XRD) and refined by <em>Le Bail</em> technique. The results of XRD analysis show that the four-layered Aurivillius compound formed, however there are additional peaks identified as perovskite and Bi_7.68Ti_0.32O_12.16  phases for <em>x</em> = 0 and perovskite and Sr₄Ti₃O₁₀phases for <em>x</em> = 0.5 and 1. The results of refinement show that four-layered Aurivillius phase formed has orthorhombic symmetry with <em>A2₁am</em> space group. Scanning Electron Microscopy (SEM) shows the plate like morphology that are characteristic of Aurivillius compound. Dielectric constant of the samples show increasing value as increasing of Mn⁴⁺ concentration.</p>