Hall Effect (IMAGE) DOE/Argonne National Laboratory Caption This shows X-ray diffraction on a single crystal of an antiferromagnetic material. This material, scientists found, exhibits an extremely large anomalous Hall effect, a sign of its topological character. Credit Argonne National Laboratory Usage Restrictions None License Licensed content 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.