Publication

Improved structural properties and crystal coherence of superconducting NdBa2Cu3O7-delta films grown by pulsed laser ablation

Davor Pavuna, Daniel Ariosa Dupont, Mike Abrecht
2000
Journal Articles

Abstract

We report on improved structural, crystallographic and electrical properties of epitaxial NdBa2Cu3O7-delta (NBCO) films grown on SrTiO3 by 'off-axis' pulsed laser deposition (PLD). Transport and XRD studies show that the c-axis-oriented epitaxial films, with critical temperatures of 90-92 K, are mono phase and single-crystalline. Furthermore, very smooth, almost outgrowth-free surfaces and crystal coherences of up to 0.8 mum (to our knowledge the best value ever reported for high-T-c films) were obtained.

Official source

https://infoscience.epfl.ch/entities/publication/e8a05c47-29f2-4b0f-97ec-1e5be95a8e3b

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Davor Pavuna, Daniel Ariosa Dupont, Mike Abrecht
2000
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/e8a05c47-29f2-4b0f-97ec-1e5be95a8e3b

About this result

Related concepts (32)

Pulsed laser deposition

Pulsed laser deposition (PLD) is a physical vapor deposition (PVD) technique where a high-power pulsed laser beam is focused inside a vacuum chamber to strike a target of the material that is to be deposited. This material is vaporized from the target (in a plasma plume) which deposits it as a thin film on a substrate (such as a silicon wafer facing the target). This process can occur in ultra high vacuum or in the presence of a background gas, such as oxygen which is commonly used when depositing oxides to fully oxygenate the deposited films.

Laser ablation

Laser ablation or photoablation (also called laser blasting) is the process of removing material from a solid (or occasionally liquid) surface by irradiating it with a laser beam. At low laser flux, the material is heated by the absorbed laser energy and evaporates or sublimates. At high laser flux, the material is typically converted to a plasma. Usually, laser ablation refers to removing material with a pulsed laser, but it is possible to ablate material with a continuous wave laser beam if the laser intensity is high enough.

Pulsed laser

Pulsed operation of lasers refers to any laser not classified as continuous wave, so that the optical power appears in pulses of some duration at some repetition rate. This encompasses a wide range of technologies addressing a number of different motivations. Some lasers are pulsed simply because they cannot be run in continuous mode. In other cases the application requires the production of pulses having as large an energy as possible.

Related publications (10)

Improved structural properties and crystal coherence of superconducting NdBa2Cu3O7-delta films grown by pulsed laser ablation

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