نوع مقاله : مقاله پژوهشی
نویسندگان
1 مرکز پژوهش ابررسانایی،گروه فیزیک، دانشکده علوم، دانشگاه ارومیه
2 استاد-دانشگاه ارومیه
چکیده
اثر آلایش نئوبیوم و CuO نانومتری (nm۴۰) بر ترکیبات Y1-xNbxBa2Cu3O7-∂ با 0/00 ≤ x ≤ 0/05 wt، که با روش حالت جامد متعارف تهیه شده‌اند را با استفاده از اندازه‌گیری‌های XRD، SEM، R(T)، و حلقه مغناطیسی (M-H) بررسی کرده‌ایم. از حلقه‌های پسماند تا Kg ۱ در بازه دمایی
K۱۰-۶۰، چگالی‌های جریان بحرانی بر حسب دما با استفاده از مدل حالت بحرانی به دست آمده است. میخکوبی شار مغناطیسی Fp نمونه‌ها با استفاده از نیروی لورنتسی به دست آمده است. وابستگی منحنی‌های اندازه‌گیری مقاومت الکتریکی به دما بیان می‌کند که نمونه با wt% x=0/01 دمای گذار Tc بالایی دارد. بررسی XRD نشان می‌دهد که نمونه‌‌های آلاییده- Nb دارای پارامتر شبکه c کوچک‌تر و راست‌لوزی (اورتورمبیک) بودن بیشتر از ۱۲۳-Y خالص هستند. همچنین از اندازه‌گیری‌های Jc و Fp مشخص شد که جایگزینی Nb به میزان wt%0/01 به جای Y در ابررسانای YBCO مقادیر Jc و Fp را ارتقا می‌دهد
کلیدواژه‌ها
عنوان مقاله [English]
The effect of partial Nb doping on magnetic and electrical behavior of Y-123 superconductors with Nano CuO
نویسندگان [English]
- R Hajilou 1
- H Sedghi 2
1 Superconductivity Research Center, Department of Physics, Faculty of Science, Urmia University, Urmia, Iran
2 Superconductivity Research Center, Department of Physics, Faculty of Science, Urmia University, Urmia, Iran
چکیده [English]
: We have investigated the effect of Niobium and Nano CuO (40 nm) dopingY1-xNbxBa2Cu3O7-∂ compounds with 0.00 ≤ x ≤ 0.05 wt. %, prepared by the conventional solid-state method by means of XRD, SEM, R(T) and magnetic loops (M-H) measurements. The critical current densities, Jc as a function of temperature have been calculated using the critical state model from the hysteresis loops up to 1 kG at the temperature range of 10-60 K. Magnetic flux pinning, Fp of samples was calculated by using Lorentz force. The temperature dependence of the electrical resistivity measurement curves indicated that the sample with x=0.01 wt.% has a high transition temperature, Tc. XRD analysis shows a shorter c axis lattice parameter and higher orthoromthcity than the pure Y-123 and other Nb-doped samples. It was also found from Jc and Fp measurement, that the 0.01 wt.% Nb substation for the Y on YBCO superconductor improves the Jc and Fp.
کلیدواژه‌ها [English]
- High-Tc superconductors
- X-ray
- Critical current density (Jc)
- Flux pinning (Fp)
- S Sathyamurthy, A Parikh, and K Salama, Processing of polycrystalline HTCS, for high current transport applications, Physica C 271 (1996) 349. https://doi.org/10.1016/S0921-4534(96)00553-9.
- M Murakami, electromagnetic applications of melt-processed YBCO, Ceramics 23 (1997) 203. https://doi.org/10.1016/S0272-8842(96)00026-0.
- K Nakazatoa, M Muralidhara, M R Koblischkaab, and M Murakamia, Fabrication of bulk Y–Ba–Cu–O superconductors with high critical current densities through the infiltration-growth process, Solid State Commun 63 (2014) 129. https://doi.org/10.1016/j.cryogenics.2014.04.003.
- M Tepe, I Avci, H Kocoglu, and D Abukay, Investigation of the variation in weak-link profile of YBa2Cu3−xAgxO7−δ superconductors by Ag doping concentration, Solid State Commun 131 (2004) 319. https://doi.org/10.1016/j.ssc.2004.05.015.
- A Yıldız, K Kocabaş, and G Akyüz, Dependence of the Structural, Electrical and Magnetic Properties of YBa2Cu3O7−δ Bulk Superconductor on the Ag Doping J Supercond and Nov Magn. 25 (2012) 1459. https://doi.org/10.1007/s10948-012-1482-8.
- R J Cava, B Batlogg, C H Chen, E A Reitman, S M Zahurak and D werder, Single-phase 60-K bulk superconductor in annealed YBa2Cu3O7−δ (0.3<δ<0.4) with correlated oxygen vacancies in the Cu-O chains, Phys. Rev. B 36 (1987) 5714. https://doi.org/10.1103/PhysRevB.36.5719.
- L Jansen, R B lock, Effect of iodine intercalation on superconductivity in the high-TC series Bi2Sr2CaN−1CuNO2N+4+δ, N=1–3, and in the yttrium doped N=2 compound. A quantitative analysis on the basis of indirect exchange pairing, A 277 (2000) 183. https://doi.org/10.1016/0378-4371(93)90240-5.
- S Nakajima, M Kikachi, Y Syono, T OKO, D Shindo, K Hiraga, N Kobayashi, H Iwasaki, Y Muto, Synthesis of bulk high Tc superconductors of TlBa2Can −1CunO2n + 3 (n = 2 − 5), Physica, C 158 (1989) 471. https://doi.org/10.1016/0921.4534(89)90246-3.
- S Dadras and M Ghavamipour, Investigation of the properties of carbon-base nanostructures doped YBa2Cu3O7−δ high temperature superconductor, Physica B 484 (2016) 13-17. https://doi.org/10.1016/j.physb.2015.12.025.
- S Dadras, Y Liu, Y S Chai, V Daadmehr, K H Kim, Increase of critical current density with doping carbon nano-tubes in YBa2Cu3O7−δ, Physica C 469 (2009) 55. https://doi.org/10.1016/j.physc.2008.11.004.
- M N Hasan, M Kiuchi, E S Otabe, T Matsuhita, M Muralidhar, Flux pinning properties of (Nd, Eu, Gd) Ba2Cu3Oy (NEG-123) superconductor with 211 phase particles Supercond, Sci. Technol 20 (2007) 345. https://doi.org/10.1088/0953-2048/20/4/008.
- A Mellekh, M Zouaoui, F B Azzouz, M Annabi, and M B Salem, Nano- Al2O3 particle addition effects on Y Ba2Cu3Oy superconducting properties Solid State Commun. 140 (2016) 318. https://doi.org/10.1016/j.ssc.2006.08.008.
13. C Xu, A. Hu, M Ichihara, N Sakai, I Hirabayashi, and M Izumi, Physica C, Enhanced flux pinning of air-processed Gd123 by doping ZrO2 nanoparticles 460 (2007) 1341. https://doi.org/10.1016/j.physc.2007.04.168.
- A K Jha and N Khare, Strongly, enhanced pinning force density in YBCO–BaTiO3 nanocomposite superconductor, Physica C 469 (2009) 810. https://doi.org/10.1016/j.physc.2009.05.008.
- T Wolf, I Apfelstedt, W Goldcker, H Küpfer, and R Flükiger, Preparation and characterization of isotropic and textured YBa2Cu3O7−x with high density and low residual resistivity, Physica C 351 (1988) 153. https://doi.org/10.1016/0921-4534(88)90628-4.
- 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, Crystallographic description of phases in the Y-Ba-Cu-O superconductor, Phys. Rev. 335 (1987) 7238. https://doi.org/10.1103/PhysRevB.35.7238.
- M B Turkoz, S Nezir, C Terzioglu, A Varilci, and G Yildirim, Investigation of Lu effect on YBa2Cu3O7-σ superconducting, compounds J Mater Sci. Mater Electron 24 (2013) 896. https://doi.org/1007/s10854-012-0846-y.
- M R Presland, J L Tallon, R G Buckley, R S Liu, and N E Flower, General trends in oxygen stoichiometry effects on Tc in Bi and Tl superconductors, Physica C 176 (1991) 95. https://doi.org/10.1016/0921-4534(91)90700-9.
- S D Obertelli, J R Cooper, and J L Tallon, Systematics in the thermoelectric power of High-Tc oxides, Phys. Rev. B 46 (22) (1992) 14928. https://doi.org/10.1103/PhysRevB.46.14928.
- J C Chen, Y Xu, M K Wu, and W Guan.: Ion-Size Effect on Normal-State Transport Properties in R8Pr0.2Ba2Cu3O7−y Systems (R = Yb, Er, Dy, Gd, Eu, and Nd). Physical Review B, 53 (1996) 5839. http://dx.doi.org/10.1103/PhysRevB.53.5839.
- A Öztürka, İ Düzgünb, S çlebi.: The effect of partial Lu doping on magnetic behaviour of YBCO (123) superconductors, J. Alloys and compound. 495 (2010) 104. https://doi.org/10.1016/j.jallcom.2010.01.095.
- C P Bean, Magnetization of Hard Superconductors, Rev. let. 8, (1962) 250. https://doi.org/10.1103/PhysRevLett.8.250.
- W C Chan, C H Chiang, and Y J Hsu, Direct Lorentz force measurement for YBa2Cu3O7–δ superconductor, Cryogenics 50 (2010) 292. https://doi.org/10.1016/j.cryogenics.2010.01.002.
- B A Malik, M A Malik, and K Asokan, Enhancement of the critical current density in YBCO/Ag composites, Chinese Journal of the physics 55 (2017) 170. https://doi.org/10.1016/j.cjph.2016.10.015.
- H Huhtinen, V P S Awana, A Gupta, H Kishan, R Laiho and A V Narlikar: Pinning centres and enhancement of critical current density in YBCO doped with Pr, Ca and Ni, Supercond. Sci. Technol. 20 (2007) 159. https://doi:10.1088/0953-2048/20/9/S08.
- B A Malik, M A Malik, and K Asokan, Magneto transport study of YBCO: Ag composites, Current Applied Physics 16 (2016) 1270 -1276. https://doi.org/10.1016/j.cap.2016.07.004.
)