Study on Incommensurate Modulation Structures in Ca-Doped Bi-2201 System
The Ca-doped Bi-2201 system with nominal composition Bi 2 Sr 2− x Ca x CuO 6+ δ ( x =0.1,0.3,0.5,0.7,0.9) was prepared by sol–gel method and investigated by X-ray diffraction, transmission electron microscopy and resistance measurements. It can be found that the Ca-doped Bi-2201 system was composed...
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| Veröffentlicht in: | Journal of superconductivity and novel magnetism 2014-02, Vol.27 (2), p.383-388 |
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| Hauptverfasser: | , , , , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The Ca-doped Bi-2201 system with nominal composition Bi
2
Sr
2−
x
Ca
x
CuO
6+
δ
(
x
=0.1,0.3,0.5,0.7,0.9) was prepared by sol–gel method and investigated by X-ray diffraction, transmission electron microscopy and resistance measurements. It can be found that the Ca-doped Bi-2201 system was composed of Bi-2201 phase containing Ca (main phase) and a small quantity of Bi
16
(Sr,Ca)
14
O
38
(impurity). For the main phase, the
b
∗
component of the modulation wave vector decreases while the
c
∗
component increases with the increase of calcium content. The evolutional mechanism of the modulation wave vector, the correlation between superconductivity and modulation wave vector were also discussed. |
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| ISSN: | 1557-1939 1557-1947 |
| DOI: | 10.1007/s10948-013-2325-y |