新的高(?)超导材料的发现已引起人们的普遍关注。对这类材料的各种物理性质的研究,不但有助于从理论上揭示其物理本质,而且有助于在实践上改进工艺。经典理论指出,没有磁场作用时,超导转变温度以下,超导体和正常体同时存在而达到平衡,并 The discovery of new high (?) Superconducting materials has caused widespread public concern. The study of various physical properties of such materials not only helps to reveal their physical essence theoretically, but also helps to improve the process in practice. Classical theory shows that in the absence of a magnetic field, the superconducting transition temperature below the superconductors and normal body exist at the same time to achieve equilibrium, and