In a paramagnetic material the directions of the magnetic moments vary randomly from atom to atom.
在顺磁材料中，磁矩的方向在原子之间随意变化。
An experimental observation on stimulated emission of radiation at liquid nitrogen temperature is reported. The paramagnetic material is synthetic ruby with about 0.1% chromium in Al2O3.
本文报导了在液氮温度范围内进行的微波受激发射的实验现象，工作物质是铬离子浓度为0.1％的人造红宝石。
An experimental observation on stimulated emission of radiation at liquid nitrogen temperature is reported. The paramagnetic material is synthetic ruby with about 0.1% chromium in Al2O3.
本文报导了在液氮温度范围内进行的微波受激发射的实验现象，工作物质是铬离子浓度为0.1％的人造红宝石。
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