Characterization of Spray-Pyrelized Superconducting YBa CuO Thin Films on Single-Crystal Mgo by transmission Electron Microscopy

S. Golden, Heikki Isotalo, M. Lanham, J. Mayer, F. Lange, M. Ruhle

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Superconducting YBaCuO thin films have been fabricated on single-crystal MgO by the spray-pyrolysis of nitrate precursors. The effects on the superconductive behavior of processing parameters such as time and temperature of heat treatment and film thickness were investigated. The superconductive behavior was found to be strongly dependent on film thickness. Films of thickness 1 μm were found to have a Tc of 67 K while thinner films showed appreciably degraded properties. Transmission electron microscopy studies have shown that the heat treatments necessary for the formation of the superconductive phase (for example, 950 °C for 30 min) also cause a substantial degree of film-substrate interdiffusion. Diffusion distances for Cu in the MgO substrate and Mg in the film were found to be sufficient to explain the degradation of the superconductive behavior in films of thickness 0.5 μm and 0.2 μm. From the concentration profiles obtained by EDS analysis diffusion coefficients at 950 °C for Mg into the YBaCuO thin film and for Cu into the MgO substrate were evaluated as 3 × 10−19 m2/s and 1 × 10−17 m2/s, respectively.
Original languageEnglish
Pages (from-to)1605-1611
JournalJournal of Materials Research
Volume5
Issue number8
DOIs
Publication statusPublished - 1990
MoE publication typeA1 Journal article-refereed

Fingerprint

sprayers
Single crystals
Transmission electron microscopy
Thin films
transmission electron microscopy
single crystals
thin films
Film thickness
heat treatment
film thickness
Substrates
Heat treatment
Superconducting films
Spray pyrolysis
Nitrates
pyrolysis
nitrates
Energy dispersive spectroscopy
diffusion coefficient
degradation

Cite this

Golden, S. ; Isotalo, Heikki ; Lanham, M. ; Mayer, J. ; Lange, F. ; Ruhle, M. / Characterization of Spray-Pyrelized Superconducting YBa CuO Thin Films on Single-Crystal Mgo by transmission Electron Microscopy. In: Journal of Materials Research. 1990 ; Vol. 5, No. 8. pp. 1605-1611.
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title = "Characterization of Spray-Pyrelized Superconducting YBa CuO Thin Films on Single-Crystal Mgo by transmission Electron Microscopy",
abstract = "Superconducting YBaCuO thin films have been fabricated on single-crystal MgO by the spray-pyrolysis of nitrate precursors. The effects on the superconductive behavior of processing parameters such as time and temperature of heat treatment and film thickness were investigated. The superconductive behavior was found to be strongly dependent on film thickness. Films of thickness 1 μm were found to have a Tc of 67 K while thinner films showed appreciably degraded properties. Transmission electron microscopy studies have shown that the heat treatments necessary for the formation of the superconductive phase (for example, 950 °C for 30 min) also cause a substantial degree of film-substrate interdiffusion. Diffusion distances for Cu in the MgO substrate and Mg in the film were found to be sufficient to explain the degradation of the superconductive behavior in films of thickness 0.5 μm and 0.2 μm. From the concentration profiles obtained by EDS analysis diffusion coefficients at 950 °C for Mg into the YBaCuO thin film and for Cu into the MgO substrate were evaluated as 3 × 10−19 m2/s and 1 × 10−17 m2/s, respectively.",
author = "S. Golden and Heikki Isotalo and M. Lanham and J. Mayer and F. Lange and M. Ruhle",
year = "1990",
doi = "10.1557/JMR.1990.1605",
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Characterization of Spray-Pyrelized Superconducting YBa CuO Thin Films on Single-Crystal Mgo by transmission Electron Microscopy. / Golden, S.; Isotalo, Heikki; Lanham, M.; Mayer, J.; Lange, F.; Ruhle, M.

In: Journal of Materials Research, Vol. 5, No. 8, 1990, p. 1605-1611.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Characterization of Spray-Pyrelized Superconducting YBa CuO Thin Films on Single-Crystal Mgo by transmission Electron Microscopy

AU - Golden, S.

AU - Isotalo, Heikki

AU - Lanham, M.

AU - Mayer, J.

AU - Lange, F.

AU - Ruhle, M.

PY - 1990

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N2 - Superconducting YBaCuO thin films have been fabricated on single-crystal MgO by the spray-pyrolysis of nitrate precursors. The effects on the superconductive behavior of processing parameters such as time and temperature of heat treatment and film thickness were investigated. The superconductive behavior was found to be strongly dependent on film thickness. Films of thickness 1 μm were found to have a Tc of 67 K while thinner films showed appreciably degraded properties. Transmission electron microscopy studies have shown that the heat treatments necessary for the formation of the superconductive phase (for example, 950 °C for 30 min) also cause a substantial degree of film-substrate interdiffusion. Diffusion distances for Cu in the MgO substrate and Mg in the film were found to be sufficient to explain the degradation of the superconductive behavior in films of thickness 0.5 μm and 0.2 μm. From the concentration profiles obtained by EDS analysis diffusion coefficients at 950 °C for Mg into the YBaCuO thin film and for Cu into the MgO substrate were evaluated as 3 × 10−19 m2/s and 1 × 10−17 m2/s, respectively.

AB - Superconducting YBaCuO thin films have been fabricated on single-crystal MgO by the spray-pyrolysis of nitrate precursors. The effects on the superconductive behavior of processing parameters such as time and temperature of heat treatment and film thickness were investigated. The superconductive behavior was found to be strongly dependent on film thickness. Films of thickness 1 μm were found to have a Tc of 67 K while thinner films showed appreciably degraded properties. Transmission electron microscopy studies have shown that the heat treatments necessary for the formation of the superconductive phase (for example, 950 °C for 30 min) also cause a substantial degree of film-substrate interdiffusion. Diffusion distances for Cu in the MgO substrate and Mg in the film were found to be sufficient to explain the degradation of the superconductive behavior in films of thickness 0.5 μm and 0.2 μm. From the concentration profiles obtained by EDS analysis diffusion coefficients at 950 °C for Mg into the YBaCuO thin film and for Cu into the MgO substrate were evaluated as 3 × 10−19 m2/s and 1 × 10−17 m2/s, respectively.

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DO - 10.1557/JMR.1990.1605

M3 - Article

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