Effects of copper content and heat treatment on the electrical properties of Ge15Te85−xCux thin films

✍ Scribed by M Dongol; M Abou Zied; G.A Gamal; A El-Denglawey

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 228 KB
• Volume: 161
• Category: Article
• ISSN: 0169-4332
• DOI: 10.1016/s0169-4332(00)00145-8

✦ Synopsis

The mechanism of incorporation of copper in amorphous films of Ge Te Cu 0 F x F 7 at.% system and the effect 15 85yx x Ž . of heat treatment are studied by measuring the dc conductivity in the temperature range 150-423 K . The results indicates that there are two conduction mechanisms. For temperature above 330 K, conductivity exhibits activated behaviour, while in Ž . low temperature range T s 150-300 K conductivity exhibits non-activated behaviour. In the high temperature region, resistance and the activation energy have been calculated. The decrease in the activation energy on addition of Cu has been interpreted according to the Kastner model. In the low temperature region Mott's parameters have been evaluated and they are decreased with Cu content; the results in this region are interpreted following Mott's model.