Effects of (La_0.67Ca_0.33MnO₃)x (x= 0.0, 0.8, 1.0) Additions on the Structural and Superconducting Transition Temperature of YBa₂Cu₃O_7-δ System

Abstract:

The effect addition of manganites compound on the superconducting properties of YBCO was investigated through X-Ray diffraction (XRD), resistance-temperature (R-T) measurement, AC Susceptometer, and Scanning Electron Microscope (SEM). Samples with addition of (La_0.67Ca_0.33MnO₃)x (LCMO) (x = 0.0, 0.8, 1.0) in YBa₂Cu₃O_7-δ (YBCO) superconductor were prepared via solid state method. Addition of LCMO in YBCO superconductor changed the properties of samples. XRD analysis showed the addition of LCMO (0.8 wt% - 1.0 wt%) formed three new peaks of LCMO. The crystal structure is orthorhombic with space group Pmmm for pure Y123 but after addition 0.8 wt% and addition 1.0 wt% of LCMO the crystal structure was changed to tetragonal and space group P4/mmm. The temperature dependent of electrical resistance showed the samples were metallic above the transition temperature even though after addition. The T_c-on superconducting transition temperature decreased from 86 K to 84 K while the T_c-off decreased from 76 K to 70 K. Diamagnetic onset transition temperature, T_c-on(dia) decreased from 90.2 K to 89.8 K. This suppression was due to the magnetic behaviour of the LCMO addition. Morphology observation showed that the grain size and grains boundary are decreased while the porosity was increased as the addition of LCMO increases.

• Periodical: Advanced Materials Research (Volume 895)
• Pages: 75-78
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.895.75
• Online since: February 2014
• Authors: B.N. Fadilah, Shaari Abdul Halim, Mansor Hashim, R.S.N. Ain, H.A.N.N. Amalina, M.M. Awang Kechik
• Keywords: Addition, Resistance, Solid-State Reaction, Susceptiblity, Transition Temperature

References

[1] Plakida. N.M. (1994); High Temperature Superconductivity Experiment and Theory; Springer.

[2] Zhang, X., Yip, K.W., and Ong, C.K. (1994); Structural Changes in YBa2Cu3O7 and YBa2Cu4O8 by Zn Doping; Physica C. 234, pp.99-107.

DOI: 10.1016/0921-4534(94)90060-4

[3] Adachi, S., Kasai, C., Tajima, S., Tanabe, K., Fujihara, S. and Kimura, T. (2001); Lowered Tc of YBa2(Cu, Zn)3O7-δ by Homogenizing Procedure and Annealing Treatments; Physica C. 351, pp.323-328.

DOI: 10.1016/s0921-4534(00)01648-8

[4] Halim, S.A., Mohamed, S.B., Azhan, H., and Khawaldeh, S. (1999); Effect of Ba and Zn doping in Bi2Pb0. 6Sr2Ca2Cu3Oδ superconductors using ac susceptibility measurements; Journal of Materials Science. 34, pp.2813-2819.

DOI: 10.1023/a:1004670931858

[5] Goldfarb, R. B, Lelental, M. and, Thompson, C.A. (1992); Magnetic Suscebtibility of Superconductors and Other Spin Systems; Eds. R. A. Hein, T. L. Francavilla, and D. H. Liebenberg, Plenum Press, New York. p.49.

[6] Ishida, T. and Goldfarb, R.B. (1990); Fundamental and harmonic susceptibilities of YBa2Cu3O7-δ; Phys. Rev. B. 41, p.8937.

[7] Goldfarb, R.B., Lelental, M. and Thompson, C.A. (1991).

[8] Wang, L., Qi, Y., Zhang, Z., Wang, D., Zhang, X., Gao, Z., Yao, C. and Ma, Y. (2010); Influence of Pb Addition on the Superconducting Properties of Polycrystalline Sr0. 6 K0. 4Fe2As2; Superconducting Science and Technology. 23. 054010.

DOI: 10.1088/0953-2048/23/5/054010

[9] Celebi, S., Kolemen, U., Malik, A.I. and Ozturk . (2002); Effect of ZnO Additions on the Magnetic Behaviour in YBCO Superconductors; Phys. Stat. Sol. (a). 194, p.260–270.

DOI: 10.1002/1521-396x(200211)194:1<260::aid-pssa260>3.0.co;2-0