Extreme chemical sensitivity of nonlinear conductivity in charge-ordered LuFe2O4

Nonlinear transport behaviors are crucial for applications in electronic technology. At the nonlinear critical turning point, the nonequilibrium states cause rich physics responses to environment. The corresponding study in this field is crucial for physics and industry application. Here nonlinear c...

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Published inScientific reports Vol. 2; no. 1; p. 330
Main Authors Cao, Shi, Li, Jun, Wang, Zhen, Tian, Huanfang, Qin, Yuanbin, Zeng, Lunjie, Ma, Chao, Yang, Huaixin, Li, Jianqi
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group UK 23.03.2012
Nature Publishing Group
Subjects
639/301/1005/1009
639/301/119/995
639/766/119
639/766/25
Behavior
Chemical reactions
Condensed matter physics
Conductivity
Electric fields
Gases
Humanities and Social Sciences
multidisciplinary
Physics
Science
Sensors
Single crystals
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Summary:Nonlinear transport behaviors are crucial for applications in electronic technology. At the nonlinear critical turning point, the nonequilibrium states cause rich physics responses to environment. The corresponding study in this field is crucial for physics and industry application. Here nonlinear conductivity in charge-ordered (CO) LuFe 2 O 4 has been demonstrated. Remarkable resistivity switching behavior was observed and the gas-sensing property can be reversibly tuned by a small alternation of partial pressure and/or chemical components of the environment. These facts allow us to use LuFe 2 O 4 materials as a sensitive chemical gas sensor in technological applications. Careful analysis of the gas sensing process in LuFe 2 O 4 suggests a novel sensing mechanism in sharp contrast with that discussed for the conventional gas sensors which depend fundamentally on surface chemical reactions.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep00330