The emergence of superconductivity in certain metals when cooled below a critical temperature is an example of a phase transition.
当温度降至临界温度以下，某些金属会突然失去电阻，出现超导现象，这就是相变的一个例子。
The result indicates that superconductivity transition temperature has a tendency of obvious dropping with the increase of Mg and Sr substituting quantity.
的超导电性能进行了系统测量，发现随着镁和锶掺杂量的增加，样品的超导转变温度总体呈明显降低趋势。
Since the discovery of the high-transition-temperature superconductivity in layered copper oxides, many researchers have searched for similar behaviour in other layered metal oxides.
自从在铜氧化物材料中发现高温超导电性以来，人们一直试图在其他层状金属氧化物中寻找同样的行为。
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