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Superconductivity in the (Nd,Ce,Ca)2Cuo4-Z System

Published online by Cambridge University Press:  28 February 2011

Takeshi Sakurai ,
Toru Yamashita ,
Sumio Ikegawa  and
H. Yamauchi
Takeshi Sakurai
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10‐13 Shinonome 1‐chôme, Koto‐ku 135, Tokyo, Japan
Toru Yamashita
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10‐13 Shinonome 1‐chôme, Koto‐ku 135, Tokyo, Japan
Sumio Ikegawa
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10‐13 Shinonome 1‐chôme, Koto‐ku 135, Tokyo, Japan
H. Yamauchi
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 10‐13 Shinonome 1‐chôme, Koto‐ku 135, Tokyo, Japan
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Abstract

We have controlled the carrier (electron) density in Nd2CuO2 of the T’ structure by introducing both Ce and Ca into the Nd‐sites, and studied the superconducting transition temperature versus carrier density relationship. The phase relations in the (Nd1‐x‐yCexCay)2CuO4‐z system were studied by means of powder X‐ray dirfractron and electron‐probe micro‐analysis techniques. For the phase diagram of the (Nd1‐x‐yCexCay)2CuO4‐z system, the single phase field of the T’ phase was established. Samples of the (Nd0.9‐yCe0.1Cay)2CuO4‐z system with compositions included in the single phase field were synthesized. The carrier density in these samples was varied by controlling the Ca content. The Hall effect and DC resistivity were measured to elucidate the relation between Tc and the carrier density.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 161
Copyright
Copyright © Materials Research Society 1990

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References

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