Refinement of incommensurate misfit compounds:: Sr14-xCaxCu24O41

被引：0
|
作者：
Pachot, S [1 ]
Darie, C [1 ]
Bérar, JF [1 ]
Bordet, P [1 ]
Bougerol-Chaillout, C [1 ]
机构：
[1] CNRS, Lab Cristallog, FR-38042 Grenoble 9, France
来源：
EPDIC 7: EUROPEAN POWDER DIFFRACTION, PTS 1 AND 2 | 2001年 / 378-3卷
关键词：
Rietveld; spin ladders; superconductors;
D O I：
10.4028/www.scientific.net/MSF.378-381.638
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Rietveld refinements of incommensurate misfit compounds Sr0.4Ca13.6Cu24O41 and Sr8Ca6Cu24O41 at 10 and 300K allow to calculate the effective valences of the copper ions. For the copper located in CuO4 squares the valence remains constant over the modulation period in Sr0.4Ca13.6Cu24O41 which becomes superconducting at high pressure, whereas it its strongly modulated in Sr8Ca6Cu24O41.
引用
收藏
页码：638 / 643
页数：6
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