Synthesis and structural analysis of the superconducting lead cuprates, (Pb, Cu) (Sr, R)2 (R′, Ce)2Cu2Oz (R, R′: rare-earth element)

Toshihiko Maeda, Kazuhiro Sakuyama, Naomichi Sakai, H. Yamauchi, Shoji Tanaka

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The structural analysis of a superconducting (Pb/Cu)-1222 phase, (Pb0.5Cu0.5)(Sr0.875Eu0.125)2(Eu0.75Ce0.25)2Cu2 Oz (z≈9), is performed by Rietveld analysis using X-ray powder diffraction data. Pb, Cu and O atoms constituting the (Pb/Cu)O monolayer in this crystal are found to be displaced from their ideal crystallographic sites as previously reported for the (Pb/Cu)-1212 compound. In addition, (Pb, Cu)-1222 compounds with nominal compositions of (Pb, Cu)(Sr, R)2(R', Ce)2Cu2Oz (R, R': rare-earth element) are synthesized and characterized. Nearly single-phase samples are successfully obtained for the compounds with R = R′ = Pr, Sm, Eu, Gd, Dy, Y or Ho, and for those with a pair of rare-earth elements, (R, R′) = (La, Eu), (Nd, Eu), (Nd, Dy), (Nd, Y), (Nd, Er), (Sm, Eu) or (Eu, Gd). Superconductivity is observed for the samples with R = R′ = Sm, Eu or Gd and also for those with (R, R′) = (La, Eu), (Nd, Eu), (Sm, Eu) or (Eu, Gd).

Original languageEnglish
Pages (from-to)337-344
Number of pages8
JournalPhysica C: Superconductivity and its applications
Volume177
Issue number4-6
DOIs
Publication statusPublished - 1991 Jul 1
Externally publishedYes

Fingerprint

Rare earth elements
structural analysis
Structural analysis
cuprates
rare earth elements
Lead
Rietveld analysis
synthesis
Superconductivity
X ray powder diffraction
Monolayers
superconductivity
Atoms
Crystals
Chemical analysis
diffraction
crystals
atoms
x rays

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Synthesis and structural analysis of the superconducting lead cuprates, (Pb, Cu) (Sr, R)2 (R′, Ce)2Cu2Oz (R, R′ : rare-earth element). / Maeda, Toshihiko; Sakuyama, Kazuhiro; Sakai, Naomichi; Yamauchi, H.; Tanaka, Shoji.

In: Physica C: Superconductivity and its applications, Vol. 177, No. 4-6, 01.07.1991, p. 337-344.

Research output: Contribution to journalArticle

@article{2b3608682c1a48b8a5a9b87bb22d8145,
title = "Synthesis and structural analysis of the superconducting lead cuprates, (Pb, Cu) (Sr, R)2 (R′, Ce)2Cu2Oz (R, R′: rare-earth element)",
abstract = "The structural analysis of a superconducting (Pb/Cu)-1222 phase, (Pb0.5Cu0.5)(Sr0.875Eu0.125)2(Eu0.75Ce0.25)2Cu2 Oz (z≈9), is performed by Rietveld analysis using X-ray powder diffraction data. Pb, Cu and O atoms constituting the (Pb/Cu)O monolayer in this crystal are found to be displaced from their ideal crystallographic sites as previously reported for the (Pb/Cu)-1212 compound. In addition, (Pb, Cu)-1222 compounds with nominal compositions of (Pb, Cu)(Sr, R)2(R', Ce)2Cu2Oz (R, R': rare-earth element) are synthesized and characterized. Nearly single-phase samples are successfully obtained for the compounds with R = R′ = Pr, Sm, Eu, Gd, Dy, Y or Ho, and for those with a pair of rare-earth elements, (R, R′) = (La, Eu), (Nd, Eu), (Nd, Dy), (Nd, Y), (Nd, Er), (Sm, Eu) or (Eu, Gd). Superconductivity is observed for the samples with R = R′ = Sm, Eu or Gd and also for those with (R, R′) = (La, Eu), (Nd, Eu), (Sm, Eu) or (Eu, Gd).",
author = "Toshihiko Maeda and Kazuhiro Sakuyama and Naomichi Sakai and H. Yamauchi and Shoji Tanaka",
year = "1991",
month = "7",
day = "1",
doi = "10.1016/0921-4534(91)90488-K",
language = "English",
volume = "177",
pages = "337--344",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",
number = "4-6",

}

TY - JOUR

T1 - Synthesis and structural analysis of the superconducting lead cuprates, (Pb, Cu) (Sr, R)2 (R′, Ce)2Cu2Oz (R, R′

T2 - rare-earth element)

AU - Maeda, Toshihiko

AU - Sakuyama, Kazuhiro

AU - Sakai, Naomichi

AU - Yamauchi, H.

AU - Tanaka, Shoji

PY - 1991/7/1

Y1 - 1991/7/1

N2 - The structural analysis of a superconducting (Pb/Cu)-1222 phase, (Pb0.5Cu0.5)(Sr0.875Eu0.125)2(Eu0.75Ce0.25)2Cu2 Oz (z≈9), is performed by Rietveld analysis using X-ray powder diffraction data. Pb, Cu and O atoms constituting the (Pb/Cu)O monolayer in this crystal are found to be displaced from their ideal crystallographic sites as previously reported for the (Pb/Cu)-1212 compound. In addition, (Pb, Cu)-1222 compounds with nominal compositions of (Pb, Cu)(Sr, R)2(R', Ce)2Cu2Oz (R, R': rare-earth element) are synthesized and characterized. Nearly single-phase samples are successfully obtained for the compounds with R = R′ = Pr, Sm, Eu, Gd, Dy, Y or Ho, and for those with a pair of rare-earth elements, (R, R′) = (La, Eu), (Nd, Eu), (Nd, Dy), (Nd, Y), (Nd, Er), (Sm, Eu) or (Eu, Gd). Superconductivity is observed for the samples with R = R′ = Sm, Eu or Gd and also for those with (R, R′) = (La, Eu), (Nd, Eu), (Sm, Eu) or (Eu, Gd).

AB - The structural analysis of a superconducting (Pb/Cu)-1222 phase, (Pb0.5Cu0.5)(Sr0.875Eu0.125)2(Eu0.75Ce0.25)2Cu2 Oz (z≈9), is performed by Rietveld analysis using X-ray powder diffraction data. Pb, Cu and O atoms constituting the (Pb/Cu)O monolayer in this crystal are found to be displaced from their ideal crystallographic sites as previously reported for the (Pb/Cu)-1212 compound. In addition, (Pb, Cu)-1222 compounds with nominal compositions of (Pb, Cu)(Sr, R)2(R', Ce)2Cu2Oz (R, R': rare-earth element) are synthesized and characterized. Nearly single-phase samples are successfully obtained for the compounds with R = R′ = Pr, Sm, Eu, Gd, Dy, Y or Ho, and for those with a pair of rare-earth elements, (R, R′) = (La, Eu), (Nd, Eu), (Nd, Dy), (Nd, Y), (Nd, Er), (Sm, Eu) or (Eu, Gd). Superconductivity is observed for the samples with R = R′ = Sm, Eu or Gd and also for those with (R, R′) = (La, Eu), (Nd, Eu), (Sm, Eu) or (Eu, Gd).

UR - http://www.scopus.com/inward/record.url?scp=0026189225&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026189225&partnerID=8YFLogxK

U2 - 10.1016/0921-4534(91)90488-K

DO - 10.1016/0921-4534(91)90488-K

M3 - Article

AN - SCOPUS:0026189225

VL - 177

SP - 337

EP - 344

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 4-6

ER -