|
Crystal Research and Technology |
Cryst. Res. Technol. 43, 83 (2008) - Abstract -
Correlation between the residual resistivity ratio and the power-law of the normal-state resistivity in MgB2
I. M. Obaidat and B. A. Albiss*
Department of Physics, United Arab Emirates University, Al-Ain 17551, United Arab Emirates
*Department of Physics, Jordan University of Science and Technology, Irbid 22110, Jordan
| Keywords | gamma irradiation, residual resistivity ratio, disorder, MgB2 |
| PACS | 74.60.Ge, 74.60.Jg, 74.70.Ad |
| DOI | 10.1002/crat.200710928 |
MgB2 polycrystalline superconducting specimens were irradiated with several doses of γ-rays up to 100 MR. An increase in the normal state resistivity and a broadening of the resistive transition to the superconducting state were observed with increasing γ-irradiation dose. Although very small changes to the superconducting transition temperature were obtained after γ-irradiation, different temperature dependence of normal-state resistivity and different residual resistivity ratios, RRR were obtained for different doses. We have found a correlation between RRR and the power law dependence of resistivity, n as the irradiation dose increases. This correlation may be an indication that the electron-phonon interaction is important in these samples. These results are attributed to the disorder caused by γ-rays.
If you have come directly to this page, click this symbol 
to go to the CRT homepage.
The full text of this paper in pdf-Format is available at Wiley Interscience.