What is it about?
The single-crystalline specimens of the Fe-doped (5% Fe) Bi2 Sr2 CaCu2 O8 (2212Cu) compound have been syn- thesized to compare the behavior of the structure modulation in Bi-cuprate and Bi-ferrate compounds.
Featured Image
Why is it important?
According to the Mossbauer data obtained, one can conclude that extra oxygen, related to the presence of Cu3+ in 2212Cu, is most probably arranged in the Ca layer rather than in the Bi layer, as was supposed in the model of extra oxygen. Basedon the analysis of the experimental data we propose the explanation of the structure modulation in Bi compounds. Due to the mismatch between the internal perovskite block and the external BiO layers the structure of the Bi compounds is distorted. The Sr layer being boundary between these blocks probably is most distorted and stressed. We suppose that the different changes related to the modulation can occur just in this layer.
Perspectives
The Bi excess, which is always present in Bi compounds (especially in single crystals), can be just the necessary condition at which the modulation appears.Extra oxygen in principle can be present in modulated structures. However, in our opinion ,it only complements the influence of other factors and is not the driving force in the structure modulation.
Dr Bagautdin Bagautdinov
Read the Original
This page is a summary of: About specific features of the structure modulation in the Bi-ferrate compounds isostructural with Bi2Sr2CaCu2O8, Physica C Superconductivity, July 2003, Elsevier,
DOI: 10.1016/s0921-4534(03)00734-2.
You can read the full text:
Contributors
The following have contributed to this page
