Pulsed laser ablation of LaSrCoO

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Span, Edward A.F. and Roesthuis, Frank J.G. and Blank, Dave H.A. and Rogalla, Horst (1999) Pulsed laser ablation of LaSrCoO. Applied Surface Science, 150 (1-4). pp. 171-177. ISSN 0169-4332

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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.
Item Type:Article
Copyright:© 1999 Elsevier Science B.V.
Faculty:
Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/24015
Official URL:http://dx.doi.org/10.1016/S0169-4332(99)00242-1
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Metis ID: 128814