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29 March 2024
 
  » arxiv » cond-mat/0505461

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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 ;
Date 19 May 2005
Subject Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el
AffiliationNPL, Delhi, INDIA), Rajiv Giri (BHU, INDIA), V.P.S. Awana, H.K. Singh, M.A. Ansari, B.V. Kumaraswamy, Anurag Gupta, Rashmi Nigam1, K.P. Singh, H. Kishan (NPL, New Delhi, INDIA) and O.N. Srivastava (BHU, INDIA
AbstractSamples 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).
Source arXiv, cond-mat/0505461
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