Multi-functional properties of CaCu3Ti4O12 thin films

Autor(es)

Felix, A. A. ^{[1, 2]} ; Rupp, J. L. M. ^[2] ; Varela, J. A. ^[1] ; Orlandi, M. O. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Quim, Dept Quim Fis, BR-14800900 Sao Paulo - Brazil

^[2] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 - USA

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Physics; v. 112, n. 5 SEP 1 2012.
• Citações Web of Science: 21
• Assunto(s): Dielétricos

Resumo

In this work, electric transport properties of CaCu3Ti4O12 (CCTO) thin films were investigated for resistive switching, rectifying and gas sensor applications. Single phase CCTO thin films were produced by polymeric precursor method (PPM) on different substrates and their electrical properties were studied. Films produced on LNO/Si substrates have symmetrical non-ohmic current-voltage characteristics, while films deposited on Pt/Si substrates have a highly asymmetrical non-ohmic behavior which is related to a metal-semiconductor junction formed at the CCTO/Pt interface. In addition, results confirm that CCTO has a resistive switching response which is enhanced by Schottky contacts. Sensor response tests revealed that CCTO films are sensitive to oxygen gas and exhibit n-type conductivity. These results demonstrate the versatility of CCTO thin film prepared by the PPM method for gas atmosphere or bias dependent resistance applications. (C) 2012 American Institute of Physics. {[}http://dx.doi.org/10.1063/1.4751344] (AU)

• Processo FAPESP: 09/00367-6 - Estudo das Propriedades de Filmes Nanoestruturados de CaCu3Ti4O12
• Beneficiário: Anderson André Felix
• Modalidade de apoio: Bolsas no Brasil - Doutorado