Synthesis of new members of Pb-based 1222 superconductors containing sulfur: (Pb sub(0.75)S sub(0.25))Sr sub(2)(RE sub(1.6)Ce sub(0.4))Cu sub(2)O sub( z) (RE = Sm, Gd, Dy, and Ho)

We have discovered new members of the Pb-based 1222 layered cuprates containing sulfur of (Pb sub(0.75)S sub(0.25))Sr sub(2)(RE sub(1.6)Ce sub(0.4))Cu sub(2)O sub(z) with RE = Sm, Gd, Dy, and Ho. All the samples are of almost-single 1222 phase. From the rho -T and chi -T measurements, they are found...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2014-05, Vol.25 (5), p.2183-2187
Main Authors: Sasakura, Hiroyuki, Akagi, Yoshiya, Tanaka, Masashi, Tsukui, Shigeki, Adachi, Motoaki
Format: Article
Language:English
Subjects:
Annealing
ANNEALING PROCESSES
COPPER OXIDE
Cuprates
CUPROUS OXIDE
Dysprosium
ELECTRICAL CONDUCTIVITY
FABRICATION
Lead (metal)
Sulfur
SUPERCONDUCTIVITY
SUPERCONDUCTORS
Synthesis
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Summary:We have discovered new members of the Pb-based 1222 layered cuprates containing sulfur of (Pb sub(0.75)S sub(0.25))Sr sub(2)(RE sub(1.6)Ce sub(0.4))Cu sub(2)O sub(z) with RE = Sm, Gd, Dy, and Ho. All the samples are of almost-single 1222 phase. From the rho -T and chi -T measurements, they are found to be superconductors after annealing under 125 atm O sub(2) atmosphere at 400 degree C. Among them, the sample with RE = Gd is found to show superconductivity at the highest temperature of 30 K.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-014-1857-7