Pulsed laser deposition of thin superconducting films of Ho1Ba2Cu3O7 − x and Y1Ba2Cu3O7 − x

Geohegan, David B.; Mashburn, D. N.; Culbertson, Robert; Pennycook, S. J.; Budai, J. D.; Valiga, R. E.; Sales, B. C.; Lowndes, D. H.; Boatner, L. A.; Sonder, E.; Eres, Gyula; Christen, D. K.; Christie, W. H.

doi:10.1557/jmr.1988.1169

Cited by 23 publications

(2 citation statements)

References 33 publications

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“…Morphological changes can create periodic structures such as ripples, ridges, and cones. [19][20][21][22][23][24][25][26] But all of these focused on the surface structure after the molten material had resolidified. Finally, the molten material resolidifies and sometimes leaves frozen capillary waves at the surface.…”

Section: Dynamic Target Reflectivity and Film Growth Of Y 2 Omentioning

confidence: 99%

Evidence for the physical basis and universality of the elimination of particulates using dual-laser ablation. I. Dynamic time-resolved target melt studies, and film growth of Y2O3 and ZnO

Mukherjee

Chen

Cuff

et al. 2002

Journal of Applied Physics

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Articles you may be interested inNanometric multiscale rough Zn-ZnO superhydrophobic thin films: Self-diffusion of zinc and effect of UV irradiation Evidence for the physical basis and universality of the elimination of particulates using dual-laser ablation. II. Dynamic time-resolved target reflectivity of metals and film growth of ZnThe application of a dual-laser ablation process, incorporating the addition of a synchronized CO 2 laser to the traditional excimer ͑KrF͒ laser used for the ablation of targets in thin film deposition, has been previously demonstrated to be effective in the elimination of particulates in films of Y 2 O 3 ͓J. Vac. Sci. Technol. A 13, 1171 ͑1995͔͒. It has been hypothesized that the efficacy of particulate removal is related to phase transformation from the solid to liquid phase prior to excimer laser ablation of the target material. In this series of two articles we present direct physical evidence of the dynamics of the phase transformation occurring on the target surface and its effect on the morphology of film growth. Pump-probe experiments have been conducted using the CO 2 laser to probe the dynamic reflectivity of the target surface on the nanosecond timescale. These experiments were conducted for a range of materials spanning a wide range of thermal conductivity including a low thermal conductivity insulator (Y 2 O 3 ), and a sublimating oxide ͑ZnO͒, as well as a high thermal conductivity metal ͑Zn͒ to assess the universal applicability of the results. In this article ͑Part I͒ the results of these dynamic reflectivity experiments are correlated with previously reported particulate-free deposition of thin films of Y 2 O 3 . Similar experiments are conducted for ZnO. In both cases, the reflectivity measurements yielded times for the onset of melt at a variety of CO 2 laser fluences. Synchronization of the KrF laser to coincide with the onset of melt resulted in particulate-free film growth. The effect of mistiming on the quality of the deposited film is presented for ZnO.

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Section: Dynamic Target Reflectivity and Film Growth Of Y 2 Omentioning

confidence: 99%

Evidence for the physical basis and universality of the elimination of particulates using dual-laser ablation. I. Dynamic time-resolved target melt studies, and film growth of Y2O3 and ZnO

Mukherjee

Chen

Cuff

et al. 2002

Journal of Applied Physics

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show abstract

“…At relatively low laser power densities, it is found that the composite target material does not vaporize congruently and consequently the film composition for a given target is dependent on both the laser power and wavelength (10). As the power density is increased, the composition of the film approaches more closely that corresponding to the target (21). At very high power levels, the film composition may therefore by less dependent on fluctuations in laser output.…”

Section: Introducfionmentioning

confidence: 99%

A Critical Review of Laser Ablation-Synthesis of High Temperature Superconducting Films

Auciello

1991

Materials and Manufacturing Processes

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Generation of complex Metal Oxides by Aerosol Processes: Superconducting ceramic particles and films

Kodas

1989

Advanced Materials

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Complex metal oxides, including ferroelectric, ferrimagnetic and superconducting ceramics, have a variety of technologically useful properties that can be exploited for a number of applications. Fabrication of complex metal oxide ceramics with specific properties requires high-purity powders with controlled chemical compositions, size distributions, and morphologies. Powders with these characteristics can be produced by aerosol processes in which fine particles are generated in gaseous flow systems. The particles can also be deposited from the gas phase onto surfaces to form films. This paper will discuss the use of aerosol processes for the generation of complex metal oxide powders. A review of aerosol processes will be presented first, followed by a discussion of the methods used for the generation of superconducting ceramic powders. Examples include the production of YBa,

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Pulsed laser deposition of thin superconducting films of Ho₁Ba₂Cu₃O₇ − x and Y₁Ba₂Cu₃O_{7 − x}

Cited by 23 publications

References 33 publications

Evidence for the physical basis and universality of the elimination of particulates using dual-laser ablation. I. Dynamic time-resolved target melt studies, and film growth of Y2O3 and ZnO

Evidence for the physical basis and universality of the elimination of particulates using dual-laser ablation. I. Dynamic time-resolved target melt studies, and film growth of Y2O3 and ZnO

A Critical Review of Laser Ablation-Synthesis of High Temperature Superconducting Films

Generation of complex Metal Oxides by Aerosol Processes: Superconducting ceramic particles and films

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