Superconductivity above 90 K in the Bi-Mg-Sr-Ca-Cu-O system
Abstract
Investigations on the influence exerted by magnesium on the superconducting properties and phase composition of samples from the Bi-Mg-Sr-Ca-Cu-O system are reported. The synthesized materials are analyzed by X-ray diffraction, emission spectral analysis, scanning electron microscopy, and electrical resistance measurements as a function of temperature. It is found that the addition of magnesium results in changes in the phase composition of the materials. The critical temperature is in the range of 93-95 K. The addition of Mg in certain optimum concentrations can have a positive effect on the superconductivity of the Bi-Sr-Ca-Cu-O system.
- Publication:
-
Journal of Superconductivity
- Pub Date:
- February 1991
- DOI:
- 10.1007/BF00618296
- Bibcode:
- 1991JSup....4...45K
- Keywords:
-
- Bismuth Oxides;
- Copper Oxides;
- Critical Temperature;
- High Temperature Superconductors;
- Mixed Oxides;
- Phase Transformations;
- Calcium Oxides;
- Electrical Resistance;
- Emission Spectra;
- Magnesium Oxides;
- Spectrum Analysis;
- Strontium Compounds;
- Solid-State Physics