Effects of Pr Substitution on Electrical Properties of Bi(Fe0.95Mn0.05)O3 Thin Films

Effects of Pr Substitution on Electrical Properties of Bi(Fe0.95Mn0.05)O3 Thin Films

The effects of Pr 3+ substitution on electrical properties of Bi(Fe 0.95 Mn 0.05 )O 3 (BFMO) thin films are investigated. The leakage current densities of BFMO films can be significantly suppressed by Pr 3+ substitution. Dielectric analysis reveals that dielectric constants of the films increase wit...

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Bibliographic Details
Published in:Jpn J Appl Phys Vol. 50; no. 1; pp. 01BF07 - 01BF07-4
Main Authors: Wen, Zheng, Wang, Zhu, Chen, Hengzhi, Shen, Xuan, Li, Xuefei, Wu, Di, Yang, Bin, Li, Aidong
Format: Journal Article
Language:English
Japanese
Published: The Japan Society of Applied Physics 01-01-2011
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Summary:The effects of Pr 3+ substitution on electrical properties of Bi(Fe 0.95 Mn 0.05 )O 3 (BFMO) thin films are investigated. The leakage current densities of BFMO films can be significantly suppressed by Pr 3+ substitution. Dielectric analysis reveals that dielectric constants of the films increase with increasing Pr 3+ content. Reduced loss tangents are obtained in Pr 3+ -substituted BFMO films. Ferroelectric measurements demonstrate that Pr 3+ substitution is helpful for lowering the coercive fields of films. In addition, a double hysteresis loop is observed in the BFMO film with 25% Bi 3+ substituted by Pr 3+ . This may be ascribed to the existence of the defect-complexes.
Bibliography:(a) XRD patterns of BFMO and BPFMO films, the cross-sectional micrograph (b) and the surface morphology (c) of BPFMO15 film. Leakage current densities as functions of electric field in various BPFMO films. Dependence of dielectric constant $\varepsilon$ and loss $\tan\delta$ as functions of frequency in various BPFMO films. (a) Room temperature $P$--$E$ hysteresis loops of the BFMO, BPFMO09, and BPFMO15 films, (b) hysteresis loops of BPFMO15 under various electric fields, and (c) $P_{\text{r}}$ and $E_{\text{c}}$ of BPFMO15 as functions of electric field. Hysteresis loops of the BPFMO25 film before and after bipolar switching.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.50.01BF07