Bilingual edition: English is preserved and Chinese follows each unit. Terminology uses the confirmed v20260916 glossary; automated semantic review remains traceable.
中英双语版：英文原文完整保留，中文紧随对应单元；术语采用 v20260916 确认表，自动语义审校结果可追溯。

Critical Magnetic Field and Critical Current

临界磁场和临界电流

It is the nature of superconductors to exclude magnetic fields (Meissner effect) so long as the applied field does not exceed their critical magnetic field. This critical magnetic field is tabulated for 0K and decreases from that magnitude with increasing temperature, reaching zero at the critical temperature for superconductivity. If the critical magnetic field is exceeded, the material makes a transition out of superconductivity to normal conductivity. The critical magnetic field at any temperature below the critical temperature is given by the relationship

超导体的特性是排斥磁场（迈斯纳效应），只要外加磁场不超过其临界磁场。这个临界磁场在0K时被列出，并且随着温度升高而减小，直到临界温度时降为零。如果外加磁场超过临界磁场，材料将从超导态过渡到正常导态。任何温度低于临界温度时的临界磁场由以下关系式给出：

For a superconductor with critical temperature Tc = K

对于临界温度为 T_c = K 的超导体
中文译文中的待填/计算数值依次对应：1：tc。实际数值以上方原输入框为准。

and a critical magnetic field at zero Kelvin of Bc(0) = T,

并且在零开尔文时的临界磁场为 B_c(0) = T，
中文译文中的待填/计算数值依次对应：1：bc。实际数值以上方原输入框为准。

then at a temperature of T = K

然后在温度为 T = K 时
中文译文中的待填/计算数值依次对应：1：t。实际数值以上方原输入框为准。

the critical magnetic field is Bc = T.

临界磁场是 B_c = T。
中文译文中的待填/计算数值依次对应：1：bct。实际数值以上方原输入框为准。

The existence of a critical magnetic field implies the existence of a maximum current in a wire of the superconducting material because the current itself generates a magnetic field according to Ampere's law.

临界磁场的存在意味着超导材料中的导线存在最大电流，因为电流本身根据安培定律会产生磁场。

For a wire of radius cm = micrometers (microns)

直径为厘米的导线，其半径为微米（微米）
中文译文中的待填/计算数值依次对应：1：r 2：rm。实际数值以上方原输入框为准。

the maximum current is Ic = Amperes.

最大电流是 I_c = 安培。
中文译文中的待填/计算数值依次对应：1：ic。实际数值以上方原输入框为准。
Illustrate mixed state
示例混合态
Examples
示例
Table of critical fields and temperatures
临界场和温度表
 Index

Superconductivity concepts

Reference Rohlf,Ch 15
索引 超导概念 参考 Rohlf，第15章
 
HyperPhysics***** Condensed Matter
HyperPhysics ***** 凝聚态物理
R Nave
 Go Back
返回