Hopfions (image) Forschungszentrum Juelich Share Print E-Mail Caption Hopfions: the more loops, the higher the Hopf number. The colors indicate the local orientations of the magnetic spins. Credit Copyright: Forschungszentrum Jülich Usage Restrictions Please give credit. Share Print E-Mail 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.