Acoustic wave monitoring of the excimer laser ablation of YBCO high-Tc superconductor
| Autor: | M. Campbell, T. Efthimiopoulos, C. Andreouli, D. Dogas |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Photoacoustic effect
business.industry Chemistry medicine.medical_treatment technology industry and agriculture Analytical chemistry General Chemistry Acoustic wave Plasma Ablation Laser law.invention Amplitude Optics law Vaporization medicine General Materials Science sense organs Physics::Atomic Physics Thin film business |
| Zdroj: | Applied Physics A Materials Science & Processing. 73:287-294 |
| ISSN: | 0947-8396 |
| DOI: | 10.1007/s003390100728 |
| Popis: | Monitoring the amplitude and the delay of arrival of the pressure waves generated during the interaction of laser pulses with YBCO in air, we can determine the vaporization and the ablation thresholds, the etching rate, the change of the acoustic wave velocity and the effect of plasma shielding on the etching rate. The steep increase of the amplitude and the order-of-magnitude increase of the etching rate above the ablation threshold, suggest that the laser–target coupling mechanism changes from (thermal) vaporization below threshold to a rapid solid-to-gas phase transition. The dumping of the acoustic waves following the ablation with successive laser pulses correlates with the evolution of the YBCO high-Tc superconductor surface morphology, which is known to relate to the deposition rate and the surface morphology of pulsed-laser-deposited high-Tc thin films. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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