Al-Doping Effects on the Structural Change of MgB2

A series of polycrystalline Al doped Mg 1− x Al x B 2 ( x =0.00, 0.01, 0.03, 0.06, 0.10, 0.15) samples were prepared using the solid-state reaction route. Phase analysis showed that Al is alloyed into the MgB 2 lattice and there were some Al 2 O 3 , MgAlB 4 particles present in bulk samples of MgB 2...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2010-02, Vol.23 (2), p.187-191
Main Authors: Ma, Jinyuan, Sun, Aimin, Wei, Guidan, Zheng, Long, Yang, Guofeng, Zhang, Xiu’e
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Effects of crystal defects, doping and substitution
Exact sciences and technology
Magnetic Materials
Magnetism
Original Paper
Physics
Physics and Astronomy
Strongly Correlated Systems
Superconductivity
Transition temperature variations
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Summary:A series of polycrystalline Al doped Mg 1− x Al x B 2 ( x =0.00, 0.01, 0.03, 0.06, 0.10, 0.15) samples were prepared using the solid-state reaction route. Phase analysis showed that Al is alloyed into the MgB 2 lattice and there were some Al 2 O 3 , MgAlB 4 particles present in bulk samples of MgB 2 . It is shown that the suppression of T c by doping originates largely from structural changes and the structure properties play an important role in influencing the normal-superconductor transport. The introduction of defects into the Mg layers and other aluminum compound (Al 2 O 3 , MgAlB 4 ) impurity phases both influence the polycrystalline structure.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-009-0513-6