他们利用红外线激光束捕获超冷锂原子气团，将其冷却到仅比绝对零度高亿分之十五开尔文。 当逐渐增加原子间斥力时，研究人员观察到的几个现象表明气体已经变得具有强磁性。
When they gradually increased the repulsive forces between the atoms, they observed several features indicating that the gas had become ferromagnetic.
通常这种热-电转化方式是利用热电偶实现的。 热电偶由两层不同的金属构成，其中一层比另一层温度高时就在两层金属间产生电流。
The usual way to do this is with a thermocouple—a sandwich of two metals that produce a current when one side of the sandwich is hotter than the other.
而固定利率一般比同一期间到期的美国国债收益率高。
The fixed-rate element normally carries a higher yield than that of Treasury bonds with the same maturity.
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