Hostname: page-component-78c5997874-s2hrs Total loading time: 0 Render date: 2024-11-14T07:13:27.805Z Has data issue: false hasContentIssue false
  • English
  • Français

Improvement in Crystal Orientation and In-plane Alignment of La-doped YBCO Thin Film on BaZrO3-buffered MgO Substrate

Published online by Cambridge University Press:  01 June 2005

Ai Kamitani ,
S. Adachi ,
H. Wakana  and
K. Tanabe
Ai Kamitani
Affiliation:
SRL-ISTEC, Koto-ku, Tokyo 135-0062, Japan
S. Adachi
Affiliation:
SRL-ISTEC, Koto-ku, Tokyo 135-0062, Japan
H. Wakana
Affiliation:
SRL-ISTEC, Koto-ku, Tokyo 135-0062, Japan
K. Tanabe
Affiliation:
SRL-ISTEC, Koto-ku, Tokyo 135-0062, Japan
Get access

Abstract

Y0.9Ba1.9La0.2Cu3Oy (La-YBCO) thin films were prepared by an off-axis magnetron sputtering method on MgO substrates with and without a BaZrO3 buffer layer. Insertion of BaZrO3 buffer layer was effective for obtaining La-YBCO films with pure c-axis orientation and in-plane alignment at low temperatures below 600 °C. We prepared La-YBCO thin films on BaZrO3-buffered MgO substrates using a temperature-gradient method, in which a template La-YBCO layer was first deposited at 600 °C, and then the temperature was continuously raised to 700 °C. By this method, La-YBCO thin films with improved crystallinity were successfully prepared. It was also proved that the insertion of the BaZrO3 buffer layer enables us to prepare high-quality La-YBCO films with high reproducibility.

Keywords

SuperconductorThin film
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 6 , June 2005 , pp. 1529 - 1535
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1Soutome, Y., Fukazawa, T., Saitoh, K., Tshukamoto, A. and Takagi, K.: HTS surface-modified junctions with integrated ground-planes for SFQ circuits. IECIC Trans. Electron. E85–C, 759 (2003).Google Scholar
2Katsuno, H., Inoue, S., Nagano, T. and Yoshida, J.: A novel multilayer process for HTS SFQ circuit. IEEE Trans. Appl. Supercond. 13(2), 809 (2003).CrossRefGoogle Scholar
3Sugiyama, H., Wakana, H., Adachi, S., Tarutani, Y. and Tanabe, K.: High-speed operation of quasi-one junction superconducting quantum interface device based on high-Tc multilayer technology. Appl. Phys. Lett. 84(14), 2587 (2004).CrossRefGoogle Scholar
4Mukaida, M., Takano, Y., Chiba, K., Moriya, T., Kusunoki, M. and Oshima, S.: In-plane orientation control of c-axis oriented YBa2Cu3O7-δ films on MgO substrates by BaSnO3 buffer layers. Jpn. J. Appl. Phys. 38, L926 (1999).CrossRefGoogle Scholar
5Chiba, K., Makino, S., Mukaida, M., Kusunoki, M. and Oshima, S.: The effect of lattice matching between buffer layer and YBa2Cu3O7-δ thin film on in-plane alignment of c-axis oriented thin films. IEEE Trans. Appl. Supercond. 11, 2734 (2001).CrossRefGoogle Scholar
6Yamazaki, Y., Makino, S., Shingai, Y., Inadomaru, M., Kousaka, D., Mukaida, M., Kusunoki, M. and Oshima, S.Effects of lattice-matching between YBa2Cu3O7-δ films and buffer layers, in Extended Abstracts, The 49th Spring Meeting, The Japan Society of Applied Physics and Related Societies. 29p-ZB-13, (2000), (in Japanese).Google Scholar
7Hasegawa, K., Izumi, T., Shiohara, Y., Sugawara, Y., Hirayama, T., Oba, F. and Ikuhara, Y.: Mechanism for improvement of in-plane alignment of SmBa2Cu3Oy films by BaZrO3 buffer layer on MgO substrate. J. Jpn. Inst. Metals 67, 295 (in Japanese).CrossRefGoogle Scholar
8Hasegawa, K., Shibata, J., Izumi, T., Shiohara, Y., Sugawara, Y., Hirayama, T., Oba, F. and Ikuhara, Y.: Improvement of superconducting properties of SmBa2Cu3Oyfilms on MgO substrate by using BaZrO3 buffer layer. Physica C 392, 835 (2003).CrossRefGoogle Scholar
9Adachi, S., Wakana, H., Horibe, M., Inoue, N., Sugano, T. and Tanabe, K.: Preparation of La-doped Yb-123 thin films for high-T c devices. Physica C 378, 1213 (2002).CrossRefGoogle Scholar
10Wakana, H., Adachi, S., Kamitani, AI., Ishimaru, Y., Tarutani, T. and Tanabe, K.Improvement in reproductivity of multilayer and junction process for HTS SFQ circuits, in Extended Abstracts, The 51th Spring Meeting, The Japan Society of Applied Physics and Related Societies. 29a-YF-6, (in Japanese).Google Scholar