摘要
从热力学唯象理论出发，讨论了Ⅱ类超导体在绝热加磁场的制冷效应。Ⅱ类超导体从 Ｍｅｉｓｓｎｅｒ态到混和态， 从混和态到正常态的相变都是二级相变， 无制冷效应。讨论了Ⅱ类超导体在 Ｍｅｉｓｓｎｅｒ态和混合态区域的制冷效应， 从物态方程出发给出了低场和高场的降温方程。
The refrigeration effect of the type Ⅱ superconductor is discussed in this paper when a magnetic field is applied to the sample.It is found that there is no refrigeration effect in the phase transition from Meissner state to the mixed state and from the mixed state to normal state and for both are the second order phase transition.The refrigeration equation is derived from the magnetization function.
出处
《低温工程》
CAS
CSCD
北大核心
1999年第4期288-291,共4页
Cryogenics
关键词
制冷效应
二级相变
Ⅱ类
超导体
M-态
混合态
Refrigeration effect
The second order phase transition
Type Ⅱ superconductor
