Influences of Pr and Mn co-substitution on crystallinity and electric properties of BiFeO3 thin films

Takeshi KAWAE; Yuki TERAUCHI; Takashi NAKAJIMA; Soichiro OKAMURA; Akiharu MORIMOTO

doi:10.2109/jcersj2.118.652

Feature: Evolution of Dielectric Materials: Papers

Influences of Pr and Mn co-substitution on crystallinity and electric properties of BiFeO₃ thin films

Takeshi KAWAE, Yuki TERAUCHI, Takashi NAKAJIMA, Soichiro OKAMURA, Akiharu MORIMOTO

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Keywords: Pb-free materials, BiFeO₃, Pr, Mn, Cosubstitution, Thin films, PLD

JOURNAL FREE ACCESS

2010 Volume 118 Issue 1380 Pages 652-655

DOI https://doi.org/10.2109/jcersj2.118.652

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Abstract

Pr and Mn co-substituted BiFeO₃ (BFO) thin films were fabricated on a Pt-coated (100) SrTiO₃ substrates by pulsed laser deposition (PLD) method. X-ray diffraction patterns indicated that the formation of impurity phases was suppressed by Pr substitution in the BFO thin films. Furthermore, by combining with small amount of Mn substitution, Pr substitution was effective for reducing the leakage current density. The polarization vs electric field curves showed well-saturated hysteresis loops with measurement frequency of 20 kHz at room temperature. The remnant polarization at a maximum electric field of 1500 kV/cm was approximately 50–70 µC/cm².

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