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Leakage Current Properties of Cation-Substituted BiFeO3Ceramics

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Title: Leakage Current Properties of Cation-Substituted BiFeO3Ceramics
Authors: Abe, Kazutomo Browse this author
Sakai, Noriyoshi Browse this author
Takahashi, Junichi Browse this author →KAKEN DB
Itoh, Hidenobu Browse this author
Adachi, Nobuyasu Browse this author
Ota, Toshitaka Browse this author
Keywords: multiferroic material
leakage current property
Issue Date: Sep-2010
Publisher: Japan Society of Applied Physics
Journal Title: Japanese Journal of Applied Physics
Volume: 49
Issue: 9
Start Page: 09MB01-1
End Page: 09MB01-6
Publisher DOI: 10.1143/JJAP.49.09MB01
Abstract: Cation-doped BiFeO3 ceramics were fabricated by sintering coprecipitated and calcined powders at 700–900 C to study the effect of cation doping on the leakage current properties of the sintered samples. Among the dopants examined in this study, Ti4þ, Sn4þ, or Zr4þ doping was found to effectively reduce the leakage current of the samples. In particular, a marked decrease in the leakage current density was achieved at 10% Ti4þ doping, which also resulted in the structure change from rhombohedral to cubic. The codoping of Ti4þ/Zn2þ ions or Ti4þ/Ni2þ ions brought about a substantial reduction in the leakage current density of the bulk samples by about four or five orders of magnitude at a small doping amount of 2%. This can be explained by the combined effect of Ti4þ doping, which basically contributes to the decreased number of oxygen vacancies in the sample, and Zn2þ or Ni2þ doping, which might assist the homogeneous substitution of Ti4þ ions for the Fe3þ sites.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高橋 順一

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