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Control of a-Axis and c-AXIS Orientation of the YBa2Cu3O7−x Thin Films by Pulsed Laser Deposition

Published online by Cambridge University Press:  26 February 2011

Gun Yong Sung ,
Jeong Dae Suh ,
Kwang Yong Kang  and
Jeong Yong Lee
Gun Yong Sung
Affiliation:
Electronics and Telecommunications Research Institute, P. O. Box 8, Daeduk Science Town, Daejeon, 305–606, KOREA.
Jeong Dae Suh
Affiliation:
Electronics and Telecommunications Research Institute, P. O. Box 8, Daeduk Science Town, Daejeon, 305–606, KOREA.
Kwang Yong Kang
Affiliation:
Electronics and Telecommunications Research Institute, P. O. Box 8, Daeduk Science Town, Daejeon, 305–606, KOREA.
Jeong Yong Lee
Affiliation:
Electronics and Telecommunications Research Institute, P. O. Box 8, Daeduk Science Town, Daejeon, 305–606, KOREA.
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Abstract

We have investigated the effect of substrate temperatures ranging from 680 °C to 800 °C on the orientation of pulsed laser deposited YBa2Cu3O7−x.(YBCO) thin films on (100) LaAlO3 substrates. X-ray diffraction studies indicate that there is a progressive change in the dominant orientation of the films from c-axis oriented (c-axis perpendicular to the substrate surface) to a-axis oriented (a-axis perpendicular to the substrate surface) grown as the substrate temperature is lowered. Two YBCO bilayers, which are the a-axis oriented YBCO film on the top of c-axis oriented YBCO film (a/c) bilayer and c-axis oriented YBCO film on the top of a-axis oriented YBCO film (c/a) bilayer, have been grown by in situ two step pulsed laser deposition and were characterized by scanning electron microscopy (SEM), Rutherford backscattering (RBS) spectrum, x-ray diffraction (XRD), and Tc measurements. Through SEM and XRD studies, double layer structures of the a/c and c/a bilayers were confirmed indirectly.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 275: Symposium S – Layered Superconductors: Fabrication, Properties and Applications , 1992 , 849
Copyright
Copyright © Materials Research Society 1992

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References

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