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Effects of Ag Addition on Superconductivity and Microstructure of DyBa2Cu3O7-δ-Ag Composite

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Abstract:

This paper reports on the effects of Ag addition on physical properties of high temperature superconductors DyBa2Cu3O7-δ (Dy123). A series of the Dy123 - Agx composite was prepared by solid state reaction method with varying amount of metallic silver (x = 0 – 0.3). Resistance versus temperature measurement was done using the four-point-probe method in the temperature range of 79 K to 300 K. Pure DyBa2Cu3O7-δ was found to superconduct with Tc onset of 91 K and Tc zero of 78 K. Addition of Ag at x = 0.05 caused both Tc onset and Tc zero to increase to 93 K and 84 K, respectively. However, Tc onset and Tc zero dropped for higher silver contents. We found that the optimum silver content in DyBa2Cu3O7-δ for best superconducting behavior and hardness is between x = 0.05 and 0.10. Microstructure analysis using SEM and EDAX showed that most of the silver is uniformly distributed along the grain boundaries filling the pores and hence increasing the hardness of the samples.

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Periodical:

Materials Science Forum (Volume 517)

Pages:

41-44

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.517.41

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Online since:

June 2006

Authors:

Baktiar Musa, Ahmad K. Yahya, Faizah Md. Salleh, R. Abd-Shukor

Keywords:

DyBa2Cu3O7-δ-Ag, Hardness, Superconductor

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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References

[1] L. Gervin, P. Campbell, Nature 330(1987), p.611.

Google Scholar

[2] M. Cankurtaran and G.A. Saunders, Supercond Sci. Technol. 9 (1992), p.210.

Google Scholar

[3] T Nishio, Y. Itoh, F. Ogasawasa, M. Suganum, Y. Yamada and O. Mizutani, J. Mater. Sci. 24: (1989), p.3228.

Google Scholar

[4] F. Deslandses, B. Raveau, P. Dubots and D. Legat, Solid State Commun. 71 (1989), p.407.

Google Scholar

[5] Singh J.P., Leu H. J., Poeppel R. B., Van Voorhees E, Goudey G.T., Winsley K. and Shi D., J. Appl. Phys. 66 (1989), p.3154.

Google Scholar

[6] J. S. Moya and E. Saiz, Solid State Commun. 74 (1990), p.1291.

Google Scholar

[7] O. Wills, Z. Fisk, J.D. Thompson, S.W. Cheong, R.M. Aikin, J.L. Smith and E. Zirngiebl, J. Magn. Mater. 67 (1987) L139.

Google Scholar

[8] P.H. Hor, R.L. Meng, Y.Q. Wang,L. Guo Z.J. Huang,J. Bechtold, K. Forster and C.W. Chu, Phys. Rev. Lett. 58 (1987) , p.1891.

Google Scholar

[9] Zhang Qi-rui, Qian Yi-tai, Chen Zu-yao, Guan Wei-yan, Zhao Yong, Zhang Han, Cao Lie-zhao, Xia Jian-sheng, Pang Guo-qang, Zhang Ming-jian, He Zheng-hui, Yu Dao-qi, Sun Shi-fang, Zhang Tao, Fang Ming-hu, Yang Zhi-ping, Solid State Commun. 63 (1987).

DOI: 10.1016/0038-1098(87)91141-0

Google Scholar

[10] K.N. Yang, Y. Dalichaouch, J.M. Ferreira, B.W. Lee, J.J. Neumeier, M.S. Torikachvili, H. Zhou and M. B. Maple, Solid State Commun. 63 (1987), p.515.

DOI: 10.1016/0038-1098(87)90282-1

Google Scholar

[11] Cao Ning, Duan Zhanguo, Shao Xiuyu, Zheng Jiaqi, Ran Qize, Liu Jinxiang, Chang Yinchuan, Hou Desen, Fan Hui, Chen Xichen, Guan Weiyan, Solid State Commun. 63 (1987), p.965.

DOI: 10.1016/0038-1098(87)90640-5

Google Scholar

[12] Takamichi Inaba, Yoshiki Takano and Kazuko Sekizawa, Solid State Commun. 70 (1989), p.725.

Google Scholar

[13] A.P. Li, Q.H. Ni and Q.P. Kong, Phys. Stat. Sol. (a) 127 (1991), p.187.

Google Scholar

[14] P. Majewski, A. Sotelo, H. Szillat, S. Kaesche and F. Aldinger, Physica C 275 (1997), p.47.

DOI: 10.1016/s0921-4534(96)00686-7

Google Scholar

[15] T. Matsushita, A. Suzuki, T. Kishida, M. Okuda and H. Naito, Supercond. Sci. Technol. 7 (1994), p.222. x = 0 x = 0. 05 x = 0. 10.

Google Scholar