| 摘要 |
<p>An oxide superconductor composition essentially consisting of a thallium barium calcium yttrium copper oxide: TlmBa2(Ca1-xYx)n-1CunO2+m+2n wherein m = 1, n = 2 and 0.1 </= x </= 0.7, m = 1, n = 3 and 0.1 </= x </= 0.8 or m = 1, n = 4 and 0.1 </= x </= 0.8 or m = 2, n = 3 and 0.1 </= x </= 0.4 is provided. This composition has controllable superconducting transition temperature Tc which is variable in accordance with the change of x value and also shows sharp transition into the superconducting state..</p> |
