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RE dependence of superconductivity in parent T’-RE2CuO4 – implication on the nature of superconductivity

Published online by Cambridge University Press:  30 July 2012

Michio Naito ,
Ai Ikeda ,
Hideki Yamamoto  and
Takaaki Manabe
Michio Naito
Affiliation:
Department of Applied Physics, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
Ai Ikeda
Affiliation:
Department of Applied Physics, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
Hideki Yamamoto
Affiliation:
Department of Material Science, NTT Basic Research Laboratories, Atsugi, Kanagawa 243-0198, Japan
Takaaki Manabe
Affiliation:
National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305-8565, Japan
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Abstract

We present the results of our systematic investigation of the RE dependency of superconductivity in the parent compounds T’-RE2CuO4 (RE = Pr, Nd, Sm, Eu, Gd, and Tb). Superconducting samples were prepared by metal organic decomposition (MOD). A stringent control of synthesis- and post-annealing-conditions is required to obtain superconducting samples. Superconductivity with a transition temperature (Tconset) ≥ 30 K is achieved for RE = Pr and Nd. By contrast, Tconset is at highest 20 K for RE = Gd. Our results indicate that the induction of superconductivity into T’-RE2CuO4 cuprates strongly depends on the RE3+ ionic size. This trend is discussed from the viewpoint of RE-dependent thermodynamic stability of T’-RE2CuO4. For smaller RE3+ ions, the thermodynamic boundary conditions become tighter.

Keywords

superconductingmetalorganic depositionCu
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1434: Symposium I – Recent Advances in Superconductors, Novel Compounds and High-Tc Materials , 2013 , mrss12-1434-i07-04
Copyright
Copyright © Materials Research Society 2012

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References

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