Properties of Bi0.8Ln0.2FeO3 (Ln=La, Gd, Ho) multiferroic ceramics

Bi0.8Ln0.2FeO3 (Ln=La, Gd, Ho) multiferroic ceramics were prepared by a solid state reaction method and their properties were investigated in detail. In the Rietveld refinements of the XRD data for these ceramics, good agreement between the measured and calculated patterns was observed. The leakage...

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Bibliographic Details
Published inCeramics international Vol. 41; no. 10; pp. 14718 - 14726
Main Authors Xue, Fei, Fu, Qiuyun, Zhou, Dongxiang, Tian, Yahui, Hu, Yunxiang, Zheng, Zhiping, Zhou, Ling
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.12.2015
Subjects
Exchange bias
Magnetoelectric
Multiferroic
Rietveld refinements
Rietveld refinements
Multiferroic
Exchange bias
Magnetoelectric
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Summary:Bi0.8Ln0.2FeO3 (Ln=La, Gd, Ho) multiferroic ceramics were prepared by a solid state reaction method and their properties were investigated in detail. In the Rietveld refinements of the XRD data for these ceramics, good agreement between the measured and calculated patterns was observed. The leakage current density and resistivity of ceramics were analyzed, and it was found that Bi0.8Ho0.2FeO3 (BHFO) ceramics possessed much better electric insulation than Bi0.8La0.2FeO3 (BLFO) and Bi0.8Gd0.2FeO3 (BGFO) ceramics. Considerable differences in magnetic properties among BLFO, BGFO, and BHFO ceramics were observed and might be correlated with the suppression of the spatially modulated spiral spin structure. A notable exchange bias effect was observed in these ceramics at room temperature, which may be correlated with exchange interaction at the interfaces of weakly ferromagnetic and antiferromagnetic components. Moreover, the magnetoelectric (ME) coupling effect was confirmed in Bi0.8Ln0.2FeO3 (Ln=La, Gd, Ho) ceramics by the magnetic field induced polarization and dielectric investigations.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2015.07.196