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The superconductor (Tl,Hg,Ca)2(Ba,Sr)2(Ca,Sr,Tl)Cu2O7.6
Martin Valldor1, Ingrid Bryntse, Andrzej Morawski
1Division of Inorganic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden. beb@inorg.su.se
Acta Crystallographica. Section C, Crystal Structure Communications
|September 3, 2002
Summary
This study investigates the 2212-type superconductor, revealing how strontium and calcium placement impacts its structure. Specific atomic arrangements lead to puckered superconducting copper-oxide layers, crucial for understanding high-temperature superconductivity.
Area of Science:
- Materials Science
- Solid-State Physics
- Chemistry
Background:
- The 2212-type superconductor is a complex copper oxide with potential applications in advanced technologies.
- Understanding the precise atomic arrangement is key to optimizing superconducting properties.
Purpose of the Study:
- To elucidate the structural role of strontium and calcium in the 2212-type superconductor.
- To investigate how specific site occupancies influence the copper-oxide layers.
Main Methods:
- Crystallographic analysis to determine atomic positions.
- Structure-property relationship investigation.
Main Results:
- Strontium occupies multiple alkali-earth metal sites within the crystal structure.
- Calcium incorporation alongside thallium leads to increased apical copper-copper distances.
- These structural modifications result in significantly puckered superconducting copper-oxide layers.
Conclusions:
- The precise placement of Sr and Ca ions critically affects the 2212-type superconductor's structure.
- Puckering of the superconducting layers, induced by specific atomic substitutions, is a key structural feature.
- This detailed structural understanding contributes to the broader field of high-temperature superconductivity research.
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