Temperature-dependent leakage current characteristics of Pr and Mn cosubstituted BiFeO3 thin films

Zheng Wen, Xuan Shen, Jingxian Wu, Di Wu, Aidong Li, Bin Yang, Zhu Wang, Hengzhi Chen, Junling Wang

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

Abstract

Leakage current characteristics of (Bi0.86Pr0.14) (Fe0.95Mn0.05) O3 (BPFMO) thin films are studied at various temperatures from 293 down to 93 K. Space charge limited current and Poole-Frenkel (PF) emission are found to be the dominant mechanism in the low and the high electric fields, respectively. The trap ionization energy at zero-field in BPFMO films is deduced to be around 0.29 eV, which indicates the existence of shallow traps. A negative differential resistivity behavior is observed before the onset of PF emission at 93 K, which is discussed in terms of the competition between electron trapping and field-assisted thermal emission. © 2010 American Institute of Physics.
Original languageEnglish
Article number202904
JournalApplied Physics Letters
Volume96
Issue number20
DOIs
Publication statusPublished - 17 May 2010
Externally publishedYes

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