It is used to refine pure elements (Rare earth metals and uranium) as well as single crystals of intermetallic compounds. The SSE technique involves passing a electrical current (up to 400 A) through a metallic rod held between two electrodes. The impurities migrate under the influence of electric filed towards one end of the sample - the purity of the central part of the sample is increased. To prevent the sample contamination (oxidation) the experiment is held under UHV conditions.
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