Nanodisk Fingerprint (2 of 2) (IMAGE) University of California - Davis Caption A different pattern emerges when the cobalt disks are 55 nanometers thick. Here the magnetic moments curl around the nanodisks to form vortices. Credit Kai Liu/UC Davis Usage Restrictions One-time usage rights to accompany story related to the University of California, Davis, news release. Must contain photo credit. 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.