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Title: In situ processing of epitaxial Y-Ba-Cu-O high T/sub c/ superconducting films on (100) SrTiO/sub 3/ and (100) YS-ZrO/sub 2/ substrates at 500--650 /sup 0/C

Abstract

We report the formation of excellent quality epitaxial YBa/sub 2/Cu/sub 3/O/sub 7/ films on (100) SrTiO/sub 3/ and (100) ZrO/sub 2/ (yttria stabilized) substrates in the temperature range of 500--650 /sup 0/C by XECl excimer laser ablation in a 0.2 Torr oxygen ambient. By applying a dc bias voltage of +300 V to an interposing ring, we were able to reduce the substrate temperatures from 650 to 500 /sup 0/C for obtaining epitaxial films. The quality of the epitaxial films was found to decrease with temperature, particularly below 550 /sup 0/C. The thickness of the superconducting films was varied from 500 to 5000 A with superconducting transition temperatures T/sub c/ (zero resistance) varying from 87 to 90 K for 650 /sup 0/C deposits. The critical current density J/sub c/ of films was found to vary linearly with temperature with values of (zero magnetic field at 77 K) 5.0 x 10/sup 6/ and 1.0 x 10/sup 6/ for films deposited at 650 /sup 0/C on (100) SrTiO/sub 3/ and (100) yttria-stabilized zirconia substrates, respectively. X-ray diffraction, transmission electron microscopy, electron channeling patterns, and Rutherford backscattering (RBS)/channeling showed excellent epitaxial quality of films on both substrates with best values of minimum ionmore » channeling yield of 3.5% on (100) SrTiO/sub 3/ substrates.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Materials Science and Engineering Department, North Carolina State University, Raleigh, North Carolina 27695-7916
OSTI Identifier:
6293843
Resource Type:
Journal Article
Journal Name:
Appl. Phys. Lett.; (United States)
Additional Journal Information:
Journal Volume: 54:22
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BARIUM OXIDES; SUPERCONDUCTIVITY; VAPOR PHASE EPITAXY; COPPER OXIDES; STRONTIUM OXIDES; VAPOR DEPOSITED COATINGS; SUPERCONDUCTING FILMS; FABRICATION; TITANIUM OXIDES; YTTRIUM OXIDES; ZIRCONIUM OXIDES; CRITICAL CURRENT; CURRENT DENSITY; EXCIMER LASERS; EXPERIMENTAL DATA; HIGH TEMPERATURE; LAYERS; LOW TEMPERATURE; TRANSITION TEMPERATURE; X-RAY DIFFRACTION; ALKALINE EARTH METAL COMPOUNDS; BARIUM COMPOUNDS; CHALCOGENIDES; COATINGS; COHERENT SCATTERING; COPPER COMPOUNDS; CURRENTS; DATA; DIFFRACTION; ELECTRIC CONDUCTIVITY; ELECTRIC CURRENTS; ELECTRICAL PROPERTIES; EPITAXY; FILMS; GAS LASERS; INFORMATION; LASERS; NUMERICAL DATA; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; SCATTERING; STRONTIUM COMPOUNDS; THERMODYNAMIC PROPERTIES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; ZIRCONIUM COMPOUNDS; 360201* - Ceramics, Cermets, & Refractories- Preparation & Fabrication; 360202 - Ceramics, Cermets, & Refractories- Structure & Phase Studies; 360204 - Ceramics, Cermets, & Refractories- Physical Properties; 656100 - Condensed Matter Physics- Superconductivity

Citation Formats

Singh, R K, Narayan, J, Singh, A K, and Krishnaswamy, J. In situ processing of epitaxial Y-Ba-Cu-O high T/sub c/ superconducting films on (100) SrTiO/sub 3/ and (100) YS-ZrO/sub 2/ substrates at 500--650 /sup 0/C. United States: N. p., 1989. Web. doi:10.1063/1.101520.
Singh, R K, Narayan, J, Singh, A K, & Krishnaswamy, J. In situ processing of epitaxial Y-Ba-Cu-O high T/sub c/ superconducting films on (100) SrTiO/sub 3/ and (100) YS-ZrO/sub 2/ substrates at 500--650 /sup 0/C. United States. https://doi.org/10.1063/1.101520
Singh, R K, Narayan, J, Singh, A K, and Krishnaswamy, J. 1989. "In situ processing of epitaxial Y-Ba-Cu-O high T/sub c/ superconducting films on (100) SrTiO/sub 3/ and (100) YS-ZrO/sub 2/ substrates at 500--650 /sup 0/C". United States. https://doi.org/10.1063/1.101520.
@article{osti_6293843,
title = {In situ processing of epitaxial Y-Ba-Cu-O high T/sub c/ superconducting films on (100) SrTiO/sub 3/ and (100) YS-ZrO/sub 2/ substrates at 500--650 /sup 0/C},
author = {Singh, R K and Narayan, J and Singh, A K and Krishnaswamy, J},
abstractNote = {We report the formation of excellent quality epitaxial YBa/sub 2/Cu/sub 3/O/sub 7/ films on (100) SrTiO/sub 3/ and (100) ZrO/sub 2/ (yttria stabilized) substrates in the temperature range of 500--650 /sup 0/C by XECl excimer laser ablation in a 0.2 Torr oxygen ambient. By applying a dc bias voltage of +300 V to an interposing ring, we were able to reduce the substrate temperatures from 650 to 500 /sup 0/C for obtaining epitaxial films. The quality of the epitaxial films was found to decrease with temperature, particularly below 550 /sup 0/C. The thickness of the superconducting films was varied from 500 to 5000 A with superconducting transition temperatures T/sub c/ (zero resistance) varying from 87 to 90 K for 650 /sup 0/C deposits. The critical current density J/sub c/ of films was found to vary linearly with temperature with values of (zero magnetic field at 77 K) 5.0 x 10/sup 6/ and 1.0 x 10/sup 6/ for films deposited at 650 /sup 0/C on (100) SrTiO/sub 3/ and (100) yttria-stabilized zirconia substrates, respectively. X-ray diffraction, transmission electron microscopy, electron channeling patterns, and Rutherford backscattering (RBS)/channeling showed excellent epitaxial quality of films on both substrates with best values of minimum ion channeling yield of 3.5% on (100) SrTiO/sub 3/ substrates.},
doi = {10.1063/1.101520},
url = {https://www.osti.gov/biblio/6293843}, journal = {Appl. Phys. Lett.; (United States)},
number = ,
volume = 54:22,
place = {United States},
year = {Mon May 29 00:00:00 EDT 1989},
month = {Mon May 29 00:00:00 EDT 1989}
}