Stuctural Domains in Barium-Iron-Arsenide Crystal (image) DOE/Ames Laboratory Share Print E-Mail Caption A polarized light microscopy image of structural domains in a barium-iron-arsenide crystal, a type of superconductor. Physicists at the US Department of Energy's Ames Laboratory discovered unexpected resistivity changes in crystals doped with potassium, which suggest a close relationship between magnetism and superconductivity in iron-based superconductors. Credit U.S. Dept. of Energy's Ames Laboratory Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.