| Autor: |
Liu, Hengwei, Sun, Aimin, Lu, Yanzhong, Ma, Yaotong, Ma, Jinyuan, Wei, Guidan, Zheng, Long |
| Předmět: |
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| Zdroj: |
Journal of Superconductivity & Novel Magnetism; Dec2010, Vol. 23 Issue 8, p1525-1528, 4p, 5 Graphs |
| Abstrakt: |
series of polycrystalline samples of MgZn(BC) ( x=0.00, 0.02, 0.04, 0.06, 0.08, and 0.10) were synthesized by a conventional solid-state reaction method under a background pressure about 10 Pa. Phase identification, crystal structure and superconducting transition temperature ( T) were studied by means of X-ray diffraction (XRD) and resistivity measurements. The results indicated that the lattice parameters a and c show no clear trend in their changes with increasing doping level, and it turned out that the dopants had a marked effect on the crystal-lattice parameters and changed the crystal structure of the samples. The T for MgZn(BC) decreased with C and Zn doping, but the rate of decrease was slower than single C-doped. We propose that the suppression of T by doping originates largely from the structural change. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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