layer of nitrogen-vacancy defects (IMAGE) Johannes Gutenberg Universitaet Mainz Caption A thin layer of nitrogen-vacancy defects in diamond allows to measure magnetic structures of samples. Credit photo/©: Arne Wickenbrock, JGU Usage Restrictions This image may only be used in connection with the press release "Combined technique using diamond probes for nanoscale imaging of magnetic vortex structure", issued by Johannes Gutenberg University Mainz on March 9, 2021. 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.