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下临界磁场 [xià lín jiè cí chǎng]
lower critical magnetic field
- 这是由于处于有利取向的晶粒在磁场作用下临界晶粒变小更易生长。
Because the critical grain size of the preferable grains becomes smaller due to the magnetic field. - 在低磁场下，硼化镁的临界电流密度与三铌化锡相当，但是在较高的磁场下却下降得很快。
The critical current density of pure MgB2 is comparable to that of triniobium tin at low magnetic fields but falls off much more rapidly at higher fields. - 临界电流密度则是在特定的温度和磁场条件下，材料变成电阻性之前所能载荷的最大电流密度。
The critical current density is the maximum current density a material can carry under specific temperature and magnetic field conditions before it becomes resistive.
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