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 language | English |
|---|---|
| Pages (from-to) | 337-344 |
| Number of pages | 8 |
| Journal | Physica C: Superconductivity and its applications |
| Volume | 177 |
| Issue number | 4-6 |
| DOIs | |
| Publication status | Published - 1991 Jul 1 |
| Externally published | Yes |
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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 journal › Article
}
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 -