Synthesis and Para-conductivity of (Tl \(_{1-x}\) Ti mat-t-e-x" xmlns:search="h

详细信息    查看全文

• 作者：Nawazish A. Khan ; S. Qamar Abbas ; Asif Mahmood
• 关键词：(Tl $$_{1 ; x}$$ 1 ; x Ti $$_{x})$$ x ) Ba $$_{2}$$ 2 Ca $$_{2}$$ 2 Cu $$_{3}$$ 3 O $$_{y}$$ y ( $$\textit{x} = 0 ; 0.2 ; 0.4 ; 0.6 ; 0.8$$ x = 0 ; 0.2 ; 0.4 ; 0.6 ; 0.8 ) superconductors ; Transition metals doping ; Increased  $$T_\mathrm{{c}}$$ T c ; Suppressed density of oxygen defects
• 刊名：Journal of Low Temperature Physics
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：182
• 期：1-2
• 页码：38-50
• 全文大小：966 KB
• 参考文献：1.N.A. Khan, S. Hussain, J. Alloys Compd. 475, 652 (2009)CrossRef
  2.N.A. Khan, S. Hussain, Physica C 470, 51 (2010)ADS CrossRef
  3.M. Mumtaz, N.A. Khan, A. Ullah, J. Low Temp. Phys. 163, 203 (2011)ADS CrossRef
  4.N. Hassan, M. Irfan, N.A. Khan, S. Khan, A. Shakoor, A. Majid, Atif M. Jadoon, Sardar Sikander Hayyat, J. Appl. Phys. 111, 053914 (2012)ADS CrossRef
  5.M. Jergel, A.C. Gallardo, C.F. Guajardo, V. Strbik, Supercond. Sci. Technol 9, 427 (1996)ADS CrossRef
  6.N.A. Khan, M. Ghafoor, S. Abbas, J. Supercond. Nov. Magn. 27, 2663–2671 (2014)CrossRef
  7.S.S.P. Parkin, V.Y. Lee, A.I. Nazzal, R. Savory, R. Beyers, S. La Placa, Phys. Rev. Lett. 61, 750 (1988)ADS CrossRef
  8.R. Beyers, S.S.P. Parkin, V.Y. Lee, S.A.I. Nazzal, R. Savoy, G. Gorman, T.C. Huang, S. La Placa, Appl. Phys. Lett. S3, 432 (1988)ADS CrossRef
  9.A.A. Aly, I.H. Ibrahim, A. Khalaf, J. Supercond. Nov. Magn. 23, 1325–1332 (2010)CrossRef
  10.N.A. Khan, M. Arif, Physica C 488, 35 (2013)ADS CrossRef
  11.A.G. Mamalis, D.E. Manolakos, Processing of High-Temperature Superconductors at High Strain Rates (Technomic Publishing Company, Lancaster, 2000)CrossRef
  12.J. Prade, A.D. Kulkarni, F.W. de Welte, Phys. Rev. B 39, 2771 (1989)ADS CrossRef
  13.A.D. Kulkarni, F.W. de Welte, J. Prade, U. Schroder, W. Kress, Phys. Rev. B 41, 6409 (1990)ADS CrossRef
  14.T. Sato, H. Nakane, N. Mori, S. Yoshizawa, Physica C 344–360, 244–247 (2003)
  15.A.K. Ghosh, S.K. Bandyopadhyay, P. Barat, P. Sen, A.N. Basu, Physica C 264, 255–260 (1996)ADS CrossRef
  16.M. Kaur, R. Srinibasan, G.K. Mehta, D. Kanjilal, R. Pinto, S.B. Ogale, S. Mohan, V. Ganesan, Physica C 443, 61–68 (2006)ADS CrossRef
  17.W.E. Lawrence, S. Doniach, in Proceedings of the Twelfth International Conference on Low Temperature Physics, ed. by E. Kanda (Keigaku, Tokyo, 1971) p. 361
  18.A.I.A. Aly, I.H. Ibrahim, R.A. Awad, A. El-Harizy, J. Supercond. Nov. Magn. 23, 1325 (2010)CrossRef
  19.M.P. Rojas Sarmiento, M.A. Uribe Laverde, E. Vera Lopez, D.A. Landinez Tellez, J. Roa-Rojas, Physica B 398, 360 (2007)ADS CrossRef
  20.F.B. Azzouz, M. Zouaoui, M. Annabi, M.B. Salem, Sol. Status Phys. C 3, 3048 (2006)CrossRef
  
• 作者单位：Nawazish A. Khan (1)
  S. Qamar Abbas (1)
  Asif Mahmood (1)
  
  1. Materials Science Laboratory, Department of Physics, Quaid-I-Azam University, Islamabad, 45320, Pakistan
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Condensed Matter
  Characterization and Evaluation Materials
  Magnetism and Magnetic Materials
  
• 出版者：Springer Netherlands
• ISSN：1573-7357

文摘

We have synthesized Ti-doped (Tl\(_{1-x}\)Ti\(_{x})\)Ba\(_{2}\)Ca\(_{2}\)Cu\(_{3}\)O\(_{y}\) (x = 0, 0.2, 0.4, 0.6, 0.8) superconductors at normal pressure. The samples have shown \(T_\mathrm{c}\) onset at 117, 118, 113, 110, and 115 K and the \(T_\mathrm{c}\) \((R=0)\) at 103, 96, 94, 97, and 106 K and the onset of diamagnetism around 109, 100, 98, 111, 100 K, respectively. The apical oxygen-related phonon modes are observed around 485 and 540 cm\(^{-1 }\), and the planar oxygen modes at 600 cm\(^{-1}\). These phonon modes are softened with the increase concentration of Ti in the final compound showing that Ti is incorporated into the (Tl\(_{1-x}\)Ti\(_{x})\)Ba\(_{2}\)Ca\(_{2}\)Cu\(_{3}\)O\(_{y}\) (x = 0, 0.2, 0.4, 0.6, 0.8) samples. The excess conductivity analysis of these samples has shown an enhancement in the values of the parameters such as \(\xi _{\mathrm{c}(0)}\), J, and \(V_\mathrm{F}\) with the doping of Ti. We proposed that the doping of Ti in the \(( {\mathrm{Tl}_{1-{\textit{x}}} \mathrm {Ti}_{{x}} })\mathrm{Ba}_2 \mathrm{O}_{4-\delta } \) charge reservoir layer facilitates the charge transfer mechanism for conducting CuO\(_{2}\) planes which in turn enhance the values of aforementioned superconductivity parameters. The values of superconductivity parameters such as \(B_\mathrm{c(0), }\) \(B_\mathrm{c1(0), }\) \(B_\mathrm{c2(0)}\), and \(J_\mathrm{c}\)(0) are, however, suppressed with Ti doping. We suggested this to be arising from the weakening of flux pinning character in the final compound. These results have shown that the oxygen defect density in (Tl\(_{1-x}\)Ti\(_{x})\)Ba\(_{2}\)Ca\(_{2}\)Cu\(_{3}\)O\(_{y}\) samples is significantly suppressed with Ti doping. Keywords (Tl\(_{1-x}\)Ti\(_{x})\)Ba\(_{2}\)Ca\(_{2}\)Cu\(_{3}\)O\(_{y}\) (\(\textit{x} = 0, 0.2, 0.4, 0.6, 0.8\)) superconductors Transition metals doping Increased \(T_\mathrm{{c}}\) Suppressed density of oxygen defects