Superconductivity with Transition Temperature Up to 80 K for TbSr 2Cu2.7Mo0.3O7+δ
Abstract
A Tb-123 phase with the composition, TbSr2Cu 2.7Mo0.3O7+δ, has been synthesized in single-phase form by the solid-state reaction route. its phase purity has been confirmed from neutron powder diffraction studies. the as-synthesized Tb-123 sample does not show superconductivity down to 5 K. on the other hand, an unusually high antiferromagnetic ordering temperature (TN) of around 7 K is seen for the Tb moments. after 120-atm-O2 post-annealing, bulk superconductivity is achieved in this compound with a superconducting transition temperature (Tc) of about 30 K, without any significant effect on TN. to achieve higher oxygen content and higher T c, the as-synthesized sample was subjected to high-pressure oxygenation, carried out in a closed cell, at 5 GPa and 400 °C in the presence of AgO as an excess-oxygen source. This sample exhibited superconductivity onset at around 80 K with a Meissner fraction larger than 10% at 5 K. Our observation of superconductivity at 80 K is the highest T c to-date for the Tb-123 type compounds. © 2003 Elsevier Ltd. All rights reserved.
Recommended Citation
V. P. Awana and A. Gupta and H. Kishan and E. Takayama-Muromachi and T. Watanabe and M. Karppinen and H. Yamauchi and S. K. Malik and W. B. Yelon and V. Ganesan and A. V. Narlikar, "Superconductivity with Transition Temperature Up to 80 K for TbSr 2Cu2.7Mo0.3O7+δ," Solid State Communications, vol. 129, no. 2, pp. 117 - 121, Elsevier, Jan 2004.
The definitive version is available at https://doi.org/10.1016/j.ssc.2003.09.037
Department(s)
Physics
Keywords and Phrases
D. Magnetism; D. Superconductivity
International Standard Serial Number (ISSN)
0038-1098
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Elsevier, All rights reserved.
Publication Date
01 Jan 2004
