Pulsed laser ablation of La0.5Sr0.5CoO3 |
| |
Authors: | Edward A F Span Frank J G Roesthuis Dave H A Blank Horst Rogalla |
| |
Institution: | Department of Applied Physics, University of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands |
| |
Abstract: | The ablation process of La0.5Sr0.5CoO3 by a spatial uniform 248 nm excimer laser beam has been characterized. Ablation rates, changes in the target surface morphology and composition have been studied as a function of the laser fluence. The dependence of the ablation rate on the laser fluence has been explained by a model based on plasma absorption. The threshold fluence for complete dissociation of the surface has been determined and is found equal to 0.7 J/cm2. Above this threshold, a steady-state target surface condition is obtained within 30 pulses. Below the threshold fluence, CoO nuclei form, which have a pronounced effect on the target composition and morphology. In addition, ellipsometric and reflectance spectra have been measured in the photon energy range of 1.8 to 5.0 eV. |
| |
Keywords: | La0 5Sr0 5CoO3 Laser ablation Threshold fluence |
本文献已被 ScienceDirect 等数据库收录! |
|