Electrons with Opposite Spins (IMAGE) Max Planck Institute for Polymer Research Caption Difference in conduction by electrons with opposite spins in ferromagnetic metals can be precisely resolved using terahertz waves. Credit © MPI-P Usage Restrictions This image may only be used with appropriate caption and credit. Editorial use only. 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.