Effects of rare earth manganites on structural, ferroelectric, and magnetic properties of BiFeO3 thin films

The results of structural studies of pure-phase perovskite thin films of BiFeO3–10% RMnO3 (R=La, Eu, Gd, Tb, and Dy) are presented. Raman scattering studies show line broadening similar to what is reported for RMnO3; they were attributed to Jahn–Teller distortion and orthorhombic structural change....

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Veröffentlicht in:Applied physics letters 2009-01, Vol.94 (1)
Hauptverfasser: Lahmar, A., Habouti, S., Dietze, M., Solterbeck, C.-H., Es-Souni, M.
Format: Artikel
Sprache:eng
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Zusammenfassung:The results of structural studies of pure-phase perovskite thin films of BiFeO3–10% RMnO3 (R=La, Eu, Gd, Tb, and Dy) are presented. Raman scattering studies show line broadening similar to what is reported for RMnO3; they were attributed to Jahn–Teller distortion and orthorhombic structural change. Evidence of an anomaly of the orthorhombic distortion at GdMnO3 could be obtained. Interestingly the addition of GdMnO3 leads to a substantial increase in magnetization, combined with moderate ferroelectric polarization. All other compositions are characterized by higher ferroelectric polarization but almost no magnetization.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3064954