Diamond anvil cell (IMAGE) Harvard University Caption An artist’s rendering of nitrogen vacancy centers in a diamond anvil cell, which can detect the expulsion of magnetic fields by a high-pressure superconductor. Credit Ella Marushchenko Usage Restrictions None License Original 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.