Impact of Zn substitution on phase formation and superconductivity of Bi1.6Pb0.4 Sr2Ca2Cu3-xZnxO10 with x = 0.0, 0.015, 0.03, 0.06, 0.09 and 0.12

R. B. Saxena; Rajiv Giri; V. P. S. Awana; H. K. Singh; M. A. Ansari; B. V. Kumaraswamy; Anurag Gupta; Rashmi Nigam1; K. P. Singh; H. Kishan; O. N. Srivastava

doi:10.1142/s0217984905008785

arXiv · cond-mat/0505461

Impact of Zn substitution on phase formation and superconductivity of Bi1.6Pb0.4 Sr2Ca2Cu3-xZnxO10 with x = 0.0, 0.015, 0.03, 0.06, 0.09 and 0.12

R. B. Saxena·Rajiv Giri·V. P. S. Awana·H. K. Singh·M. A. Ansari·B. V. Kumaraswamy·Anurag Gupta·Rashmi Nigam1·K. P. Singh·H. Kishan·O. N. Srivastava

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Abstract

Samples of series Bi1.6Pb0.4Sr2Ca2Cu3-xZnxO10 with x = 0.0, 0.015, 0.03, 0.06, 0.09 and 0.12 are synthesized by solid-state reaction route. All the samples crystallize in tetragonal structure with majority (> 90%) of Bi-2223 (Bi2Sr2Ca2Cu3O10) phase (c-lattice parameter ~ 36 A0). The proportion of Bi-2223 phase decreases slightly with an increase in x. The lattice parameters a and c of main phase (Bi-2223) do not change significantly with increasing x. Superconducting critical transition temperature (Tc) decreases with x as evidenced by both resistivity [(T)] and AC magnetic susceptibility [(T)] measurements. Interestingly the decrement of Tc is not monotonic and the same saturates at around 96 K for x > 0.06. In fact Tc decreases fast (~10K/at%) for x = 0.015 and 0.03 samples and later nearly saturates for higher x values. Present results of Zn doping in Bi-2223 system are compared with Zn doped other HTSC (High temperature superconducting) systems, namely the RE-123 (REBa2Cu3O7) and La-214 ((La,Sr)2CuO4).

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R. B. Saxena, Rajiv Giri, V. P. S. Awana, H. K. Singh, M. A. Ansari, B. V. Kumaraswamy, Anurag Gupta, Rashmi Nigam1, K. P. Singh, H. Kishan, O. N. Srivastava. 2005-05-19. Impact of Zn substitution on phase formation and superconductivity of Bi1.6Pb0.4 Sr2Ca2Cu3-xZnxO10 with x = 0.0, 0.015, 0.03, 0.06, 0.09 and 0.12. https://doi.org/10.1142/s0217984905008785

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