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Precursor pathway to superconducting HgBa2(Ca0.86Sr0.14)2Cu3O8+δ with a Tc of 132 K

Published online by Cambridge University Press:  03 March 2011

Nam H. Hur ,
Nae H. Kim ,
Yong K. Park  and
Jong C. Park
Nam H. Hur
Affiliation:
Korea Research Institute of Standards and Science, P.O. Box 102 Yusong, Taejon 305-600, Republic of Korea
Nae H. Kim
Affiliation:
Korea Research Institute of Standards and Science, P.O. Box 102 Yusong, Taejon 305-600, Republic of Korea
Yong K. Park
Affiliation:
Korea Research Institute of Standards and Science, P.O. Box 102 Yusong, Taejon 305-600, Republic of Korea
Jong C. Park
Affiliation:
Korea Research Institute of Standards and Science, P.O. Box 102 Yusong, Taejon 305-600, Republic of Korea
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Abstract

Polycrystalline samples of HgBa2(Ca0.86Sr0.14)2Cu3O8+δ (denoted as Hg-1223) were prepared by a precursor route, which involves the reaction between HgO and two precursors: Ba2CuO3+x and Ca0.14CuO2. X-ray powder diffraction analysis revealed that the Hg-1223 is isostructural with pristine HgBa2Ca2Cu3O8−δ and TlBa2Ca2Cu3O9−δ. The Hg-1223 has tetragonal symmetry with space group P4/mmm, and lattice parameters a = 3.8648(2) Å and c = 16.0319(2) Å. The as-synthesized Hg-1223 sample has a Tc of about 126 K. After annealing in an oxygen atmosphere at 280 °C for 10 h, the Tc increased to 132 K. Using this precursor pathway, Hg-1223 samples can be reproducibly synthesized.

Type
Rapid Communication
Information
Journal of Materials Research , Volume 10 , Issue 12 , December 1995 , pp. 2985 - 2987
Copyright
Copyright © Materials Research Society 1995

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References

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