NDLI: Laser surface interaction of high-tc superconductors

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Laser surface interaction of high-tc superconductors

Content Provider	NASA Technical Reports Server (NTRS)
Author	Phillips, R. C. McCann, M. P. Chen, C. H.
Copyright Year	1991
Description	During the past two years, one of the most exciting research fields in science has been the study of the newly discovered high-T(sub c) metal oxide superconductors. Although many theoretical models were proposed, there is no general agreement on any theory to explain these materials. One of the peculiar features of these high-T(sub c) materials is the noninteger number of oxygen atoms. The oxygen content is extremely critical to the superconductive properties. Take YBa2Cu3O(7-x) as an example. Its superconductive properties disappear whenever x is larger than 0.5. The existence of Cu(+ 3) was considered to account for x less than 0.5. However, results from mass spectroscopy of laser desorbed species indicate that significant quantities of oxygen molecules are trapped in the bulk of these high-T(sub c) superconductors. It appears that these trapped oxygen molecules may play key roles in superconductive properties. Preparation of superconductive thin films are considered very important for the applications of these new superconductors for the electronics industry. Fluorescence spectra and ion spectra following laser ablation of high-temperature superconductors were obtained. A real time monitor for preparation of superconductive thin films can possibly be developed.
File Size	602057
Page Count	8
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19920012397
Archival Resource Key	ark:/13960/t3b042j07
Language	English
Publisher Date	1991-01-01
Access Restriction	Open
Subject Keyword	Solid-state Physics Electronic Equipment Fluorescence Mass Spectroscopy High Temperature Superconductors Desorption Electromagnetic Interactions Ablation Real Time Operation Thin Films Metal Oxides Superconducting Films Oxygen Atoms Lasers Surface Reactions Barium Oxides Monitors Mathematical Models Copper Oxides Yttrium Oxides Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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