 Samarium ( and its sesquioxide ) are paramagnetic at room temperature . Their corresponding effective magnetic moments , below 2µB , are the 3rd lowest among the lanthanides ( and their oxides ) after lanthanum and lutetium . The metal transforms to an antiferromagnetic state upon cooling to 14 @.@ 8 K. Individual samarium atoms can be isolated by encapsulating them into fullerene molecules . They can also be doped between the C60 molecules in the fullerene solid , rendering it superconductive at temperatures below 8 K. Samarium doping of iron @-@ based superconductors – the most recent class of high @-@ temperature superconductors – allows to enhance their transition temperature to 56 K , which is the highest value achieved so far in this series . 
