Crystal growth and characterization of MgB2: Relation between structure and superconducting properties
arXiv:cond-mat/0207247 · doi:10.1088/0953-2048/16/2/316
Abstract
We discuss the important aspects of synthesis and crystal growth of MgB2 under high pressure (P) and temperature (T) in Mg-B-N system, including the optimisation of P-T conditions for reproducible crystal growth, the role of liquid phases in this process, the temperature dependence of crystal size and the effect of growing instabilities on single crystals morphology. Extensive experiments have been carried out on single crystals with slightly different lattice constants and defects concentration, which revealed and possible effects of Mg-deficiency and lattice strain on the superconducting properties of MgB2 (Tc, Jc, residual resistivity ratio, anisotropy etc.).
29 pages, 9 figures, 1 table, Proc.of International Workshop on Superconductivity in Magnesium Diboride and Related Materials "BOROMAG", 17-19 June 2002, Genoa, Italy (submitted to Supercond.Sci and Technol.)
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- Universal relationship between crystallinity and irreversibility field of MgB2
- Strongly Enhanced Current-Carrying Performance in MgB2 Tape Conductors by Novel C60 Doping
- Characterization of high-quality MgB2(0001) epitaxial films on Mg(0001)
- Structural studies of metastable and equilibrium vortex lattice domains in MgB2