| 1 | This paper described how to study superconductivity by ac susceptibility(acs) measurements. | |
| 2 | The research center is carrying out a thorough study of this metal's superconductivity. | |
| 3 | The research center is carrying out a thorough study of this metal's superconductivity. | |
| 4 | Perfect conductivity is the first traditional hallmark of super- conductivity . | |
| 5 | The superconductivity in effective repulsive interaction between two electrons is considered. |