Influence of Fe3+ substitution on the dielectric and ferroelectric characteristics of Lead Indium Niobate

• Prepared phase-pure Fe3+-substituted Lead Indium Niobate, Pb[(In0.50−xFex)Nb0.50]O3 by sol–gel method.
• Spontaneous Relaxor (R) → Ferroelectric (FE) transition observed for the composition with x = 0.20.
• Local structural rearrangement responsible for R → FE transition has been confirmed by Raman spectroscopy.

Lead Indium Niobate, Pb(In0.50Nb0.50)O3 (PIN) is a complex perovskite that exhibits Relaxor (R) characteristics. In this study, we report the synthesis of phase-pure compositions in the system Pb[(In0.50−xFex)Nb0.50]O3 by sol–gel method and discuss the influence of isovalent substitution of Indium by Iron on the dielectric and ferroelectric characteristics. Spontaneous transition to the Ferroelectric (FE) phase has been observed for the composition having x = 0.20. Local structural rearrangements responsible for R → FE transition have also been studied by Raman spectroscopy and are discussed in detail.

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