Synthesis of Sr_1+2xLa_1‐2xFe_1‐xNb_xO₄ (x=0, 0.1, 0.3, and 0.5) by Sol‐gel Method: Structural, Magnetic, and Dielectric Properties

Abstract

REPRINTz Materials Science inc. Nanomaterials &Polymers Synthesis of Sr 1 + + 2x La 1-2x Fe 1-x Nb x O 4 (x = 0, 0.1, 0.3, and 0.5) by Sol-gel Method: Structural, Magnetic, and Dielectric PropertiesArif Kurnia, [a] Emriadi, [a] NandangM ufti, [b] and Zulhadjri* [a] One -l ayered Ruddlesden-Popper phase Sr 1 + 2x La 1-2x Fe 1-x Nb x O 4 doped with niobium was synthesized using as ol-gel method for various Nb concentrations (x = 0, 0.1, 0.3, and 0.5). Singlephase samples could be observed with x = 0a nd 0.1, while x = 0.3 and 0.5 contain additional phases.M icrostructurer esults showed that the increase of niobium content corresponded to ad ecrease in the grain size of the samples. The magnetic measurements indicated that antiferromagnetic interactions of doped samples had decreased. The dielectric constant of the samples decreased as x increased due to the increase in conductivity. The origin of conductioni nthe samples might be caused by hopping conduction due to the mixed oxidation states of iron with charge + 3and + 4.