Epitaxial layered cobaltite NaxCoO2 thin films grown on planar and vicinal cut substrates

✍ Scribed by L. Yu; L. Gu; Y. Wang; P.X. Zhang; H.-U. Habermeier

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 822 KB
• Volume: 328
• Category: Article
• ISSN: 0022-0248
• DOI: 10.1016/j.jcrysgro.2011.06.033

✦ Synopsis

Epitaxial layered cobaltite Na 0.5-0.7 CoO 2 thin films have been grown on planar SrTiO 3 (1 0 0), SrTiO 3 (1 1 0), LaAlO 3 (1 0 0) and a-Al 2 O 3 (0 0 0 1) substrates successfully by pulse laser deposition.

The annealing temperature to influence of the crystal structure, surface morphology and electrical transport properties of Na x CoO 2 thin films has been investigated. The layered structure of Na x CoO 2 film and the interface between the film and substrate have been observed clearly by high resolution transmission electron microscopy. Vicinal cut SrTiO 3 (1 0 0) substrates with the c-axis tilted angle y 3-101 have been used to grow Na x CoO 2 thin films, which reveals that the c-axis orientation epitaxial growth on vicinal cut SrTiO 3 (1 0 0) substrates only occurred when tilted angle yr51.