Spectroscopic and ion probe measurements of KrF laser ablated Y-Ba-Cu-O bulk samples

Dyer, P. E.; Greenough, R.D.; Issa, A.; Key, P.H.

doi:10.1063/1.100628

Cited by 156 publications

(28 citation statements)

References 12 publications

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“…It may be mentioned that Dyer et al (1988) attributed the time lags for the various species to plasma expansion time delays of different components so that the velocities should have (M)-l/2 dependance (M = mass of the species). Our results apparently do not support this view (figure 3).…”

Section: Discussionmentioning

confidence: 99%

Characteristics of laser-induced plasma from highT c superconductor

et al. 1991

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AiJsIract. The spectroscopic analysis of the emission from the plasma produced by irradiating a high T, superconducting GdBa z Cu)07 target with a high power Nd: Y AG laser beam shows the existence of the bands from dilTerent oxides in addition to the lines from neutrals and ions of the constituent elements. The spectral emissions by oxide species in laser-induced plasma show considerable time delays as compared to those from neutral and ionic species. Recombination processes taking place during the cooling of the hot plasma.rather than the plasma expansion velocities, have been found to be responsible for the observed time delays in this case. The decays of emission intensities from various species are found to be non-exponential.

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Section: Discussionmentioning

confidence: 99%

Characteristics of laser-induced plasma from highT c superconductor

et al. 1991

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“…[1][2][3][4][5][6][7] For example, in pulsed laser deposition ͑PLD͒ of thin films, the technique has the advantages of preserving the stoichiometry of the target material, having an energy source located outside the vacuum vessel and being capable of rapid growth rates. The plume conditions are of great interest to scientists developing the techniques and have been investigated with a variety of diagnostics.…”

Section: Introductionmentioning

confidence: 99%

Optical Thomson scatter from a laser-ablated magnesium plume

Delserieys

Khattak

Lewis

et al. 2009

Journal of Applied Physics

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We have carried out an optical Thomson scatter study of a KrF laser-ablated Mg plume. The evolution of the electron temperature and density at distances 2 -5 mm from the target surface has been studied. We have observed that the electron density falls more rapidly than the atomic density and believe that this is a result of rapid dielectronic recombination. A comparison of the electron density profile and evolution with simple hydrodynamic modeling indicates that there is a strong absorption of the laser in the plasma vapor above the target, probably due to photoionization. We also conclude that an isothermal model of expansion better fits the data than an isentropic expansion model. Finally, we compared data obtained from Thomson scatter with those obtained by emission spectroscopy under similar conditions. The two sets of data have differences but are broadly consistent.

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“…Its main features are the direction perpendicular to the target surface and the brightly colored material specific appearance. Dyer et al [71] investigated the principal luminescent species, expansion velocities, and the extent of ionization using visible UV spectroscopy and ion probes. Their results have identified the major luminescent species in the plume of KrF laser ablated Y-Ba-Cu-O superconductor samples as arising from neutral and ionized atoms and suboxides.…”

Section: Pulsed Laser Depositionmentioning

confidence: 99%

Science and technology of cuprate-based high temperature superconductor thin films, heterostructures and superlattices—the first 30 years (Review Article)

Habermeier

2016

Low Temperature Physics

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Science and technology of cuprate-based high temperature superconductor thin films, heterostructures and superlattices -the first 30 years (Review Article) H.-U. Habermeier Science Consulting International, Niersteinerstr, 28, Stuttgart D 70499, Germany Max-Planck-Institute for Solid State Research, Heisenbergstr, 1, Stuttgart D 70569, Germany E-mail: huh@fkf.mpg.de Received May 30, 2016, published online August 25, 2016 During the three decades after the discovery of superconductivity at high temperatures in copper oxides, intense research activities generated a tremendous progress in both, mastering the scientific challenges underpinning the understanding of the properties of these chemically and structurally complex materials as well as achieving a mature technology in preparing single phase bulk specimens -including single crystals -and epitaxially grown single crystalline thin films. This review covers in addition to more basic physics oriented developments mainly technological aspects of complex oxide thin film deposition as an enabling technology to explore the physics of these materials. It consists of two parts: after a brief introduction to the materials development prior to the discovery of superconducting copper oxides, a description of the relevant properties of copper oxide superconductors with focus on YBa 2 Cu 3 O 7-δ is given, followed by the coverage of essentials of complex oxide thin film deposition technology with the copper oxides at its core. Here, the major physical vapor deposition technologies (evaporation and oxide molecular beam technology, sputtering and pulsed laser deposition) are described followed by an overview of substrate requirements to deposit high quality thin films. Opportunities by choosing special substrates with unique properties far beyond the usual mechanical support for a film are introduced with examples aside from usual lattice mismatch induced strain effects. One is the continuous modification of the strain state by poling ferroelectric oxide substrates linked to a piezoelectric effect, the other is the nanoscale tailoring of substrate step-and-terrace structures resulting in a controllable generation of planar defects in complex oxides, thus contributing to the physics of flux-line pinning in cuprate superconductors. In the second part of this review, first some highlights of single layer thin film research are given such as to tailor thin film orientation, generating well defined antiphase boundaries in YBa 2 Cu 3 O 7-δ thin films as flux-line pinning centers as well as contributions to understand fluctuation conductivity in relation to the pseudogap state. In the last section new developments in high T c cuprate based heterostructures and superlattices are reviewed with a special focus on the opportunities offered by interface-induced electronic interactions.

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Spectroscopic and ion probe measurements of KrF laser ablated Y-Ba-Cu-O bulk samples

Cited by 156 publications

References 12 publications

Characteristics of laser-induced plasma from highT c superconductor

Characteristics of laser-induced plasma from highT c superconductor

Optical Thomson scatter from a laser-ablated magnesium plume

Science and technology of cuprate-based high temperature superconductor thin films, heterostructures and superlattices—the first 30 years (Review Article)

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