High purity specimens of URu2Si2 produced by a molten metal flux technique

We report a molten metal flux technique to produce high purity specimens of URu [GRAPHICS] Si [GRAPHICS] . Magnetic susceptibility ( [GRAPHICS] [GRAPHICS] [GRAPHICS] ), heat capacity ( [GRAPHICS] ) and electrical resistivity ( [GRAPHICS] ) measurements show that the bulk properties of these crystals are similar to those that are produced by the Czochralski technique followed by solid-state electro-transport. In particular, we find residual resistivity ratios RRR [GRAPHICS] [GRAPHICS] / [GRAPHICS] as large as 220.