Tunable Magnetics (IMAGE) University of Chicago Caption A magnetic crystal sits on the head of a dime for scale. Scientists exploit the randomness of the magnetic field in the crystal at the molecular level to control the properties of the magnet as a whole. The chip underneath the crystal is a magnetic sensor. Credit University of Chicago Usage Restrictions News organizations may use this image in connection with reports describing the work of Daniel Silevitch and Thomas Rosenbaum and Gabriel Aeppli. 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.