Document Type : Original Article
Authors
Department of physics, Superconductivity Research Center, Urmia University, Urmia, Iran
Abstract
In this study, we report the synthesis and characterization of YBa2Cu3O7-δ (YBCO) high temperature superconductor prepared by solid state method and doped with Nb in different weight percentages, 0, 0.01, 0.02 and 0.05 wt%. The x-ray diffraction (XRD) analysis confirms the formation of orthorhombic phase of superconductivity for all the prepared samples. We evaluated the effects of Nb doping on the normal state resistivity (ρ), superconducting transition temperature (Tc), scanning electron microscope (SEM. The critical current densities, JC as a function of temperature have been calculated using the critical state model from the hysteresis loops up to 1T at temperature range of 10K to 60K. Magnetic flux pinning, FP of samples was calculated by using Lorentz force. XRD analysis show a shorter c axis parameter and higher orthoromthcity than the pure Y-123 and other Nb doped samples. It was also found from critical current density and magnetic flux pinning force measurement the 0.01 wt% Nb substation for Y on YBCO superconductors improve the critical current density and flux pinning force.
Keywords
- J G Bednorz and K A Muller, Zeitschrift für Physik B Condensed Matter 64 (1986) 189.
- M K Wu, J R Ashburn, C J Tong, P H Hor, R L Meng, L Gao, Z H Huang, Y O Wang, and C W Chu, Physical Review Letters 58 (1987) 908.
- J W Ekin, A I Braginski, A J Panson, M A Janocko, D W Capone, N J Zaluzec, B Flandermeyer, O F de Lima, M Hong, J Kwo, and S H Liou, Journal of Applied Physics 62 (1987) 4821.
- S Kim, S Zhou, Y Hu, M Acik, Y J C Berger, W De Here, A Bongiorno, and E Riedo, Mater. 11 (2012) 544.
- X S Wu, S S Jiang, J Lin, J S Liu, and W M Chen, Jin, Phys. C 309 (1998) 25.
- R Giri, V P S Awana, H K Singh, R S Tiwari, and O N Srivastava, Anurag Gupta,B. V. Kumaraswamy, H. Kishan, Phys. C 419 (2005) 101.
- M Karppinen and H Yamauchi, J Inorg. Mater. 2 (2000) 589.
- J J Capponi, C Chaillont, A W Hewat, P Lejay, M Mariezio, N Nguyou, B Raveau, J L Sonbeyroux, J Tho-lence, and R Tounier, Phys. Lett. 3 (1987) 1301.
- H Yamauchi, M Karppinen, Sci. Technol. 13 (2000) R 33.
- R Beyers and T M Shaw, Solid State Phys. 42 (1989) 135.
- N P Liyanawaduge, A Kumar, B S B Karunarathne, V P S Awana, Journal of Superconductivity and Novel Magnetism 25 (2012) 31.
- N P Liyanawaduge, A Kumar, R Jha, B S B Karunarathne, and V P S Awana, Alloys & Compd. 74 (2012) 1.
- C G S Pillai and A M George, “Substitution of Copper by Niobium in Superconducting YBa2Cu3O7-δ,” Journal of Material Science Lett. 23 (1992) 1639.
- E K Nazarova, K Nenkov, G Fuchs, and K-H Muller, Effects of Calcium Substitution on the Superconducting Properties of R1−xCaxBa2Cu3Oz (R = Eu, Gd, Er; 0 ≤ x ≤ 0.3) Polycrystalline Samples. Physica 436 (2006) 25.
- W E Farneth, R K Bordia, E M McCarron III, M K Crawford, and R B Flippen, Solid State Commun. 66 (1988) 953.
- R M Hazen, L W Finger, R J Angel, C T Perwitt, N L Ross, H K Mao, C G Hadidiacos, P H Hor, R L Meng, and C. W Chu, Rev. 335 (1987) 7238.
- M B Turkoz, S Nezir, C Terzioglu, A Varilci, G Yildirim, J Mater Sci. Mater Electron 24 (2013) 896.
- B D Cullity, Element of X-Ray Diffraction. Addison-Wesley Reading, Boston (1978).
- S D Obertelli, J R Cooper, and J LTallon, Rev. B 46 (22) (1992) 14928.
- B Abeles, H L Pinch, and J I Gittleman, Rev. Lett. 35 (1975) 247.
- B Abeles, H L Pinch, and J I Gittleman, Rev. Lett. 35 (1975) 247.
- A Ozlark, I Duzgun, and S Celebi, Alleys and compd. 495 (2010) 104.
- C P Bean, Phys Rev let 8 (1962) 250.
- WC Chan, C H Chiang, and Y J Hsu, Cryogenics 50 (2010) 292.
- Z D Yakinci, D M Gokhfed, E Altin, F Kurt, S Altin, S Demirel. M A Aksan and M E Yakinciy, Mater Sci: 24 (2013) 4790.
- A Schmehl, B Goetz, R R Schuls, C W Schneider, H Bielefeldt, H Hilgenkamp, and J Mannhart, Lett. 47 (1999) 110.
- G Hammerl, A Schmehl, R R Schuls, B Gaoetz, H Bielefeldt, C W Shneider, H Hilegen kamp, and J Mannhart, Nature 407 (2000) 162.
- B A Malik, M A Malik, and K Asokan, Chinese Journal of the physics 55 (2017) 170.
)