The growth and conductivity of CaCuO2 epitaxial thin films

✍ Scribed by Gennady A. Ovsyannikov; Sergey A. Denisuk; Igor K. Bdikin; Zdravko G. Ivanov; Tord Claeson

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 989 KB
• Volume: 408-410
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2004.03.050

✦ Synopsis

Growth, structure and conductivity of epitaxial thin films of CaCuO 2 (CCO) on SrTiO 3 , LaAlO 3 and NdGaO 3 substrates were investigated. The films were deposited by pulsed laser ablation from a single stoichiometric target at a pressure of 0.3 mbar and temperatures higher than 700 °C. X-ray diffraction reveals that films on (1 1 0)NdGaO 3 substrates are single crystals of high quality without twinning and with extremely narrow (less then 0.05°) rocking curves. An expansion of the c-axis lattice constant is observed as Sr replaces Ca in CCO films. Transport measurements show that CCO films have a hopping conductivity for all films deposited on all the substrates with a resistivity within the range 10 À1 -10 4 X cm.