Year: 2008
Type: article
Abstract: Epitaxial Na x CoO 2 thin films were deposited on (0 0 1) sapphire by the pulsed laser deposition method. Epitaxial Na 0.5 CoO 2 thin film with a high crystallinity was achieved resulting from Na deintercalation of epitaxial Na 0.7 CoO 2 with the solution of iodine-dissolved acetonitrile. Based on the x-ray diffraction data along the out-of-plane and the in-plane, there was only elongation of the c -lattice constant of Na 0.5 CoO 2 after sodium deintercalation. The Na 0.7 CoO 2 and Na 0.5 CoO 2 thin films show layer-by-layer growth closely following an ideal step flow growth mode. The metallic behaviour of the Na 0.7 CoO 2 thin film and the charge-ordered insulator property of the Na 0.5 CoO 2 thin film were confirmed.
Author: J Y Son
Institution: Pohang University of Science and Technology
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2062557010