Ferromagnetic Ring (IMAGE) Johannes Gutenberg Universitaet Mainz Caption This is an image of a ferromagnetic ring prepared using a scanning electron microscope. The magnetization (black/white contrast) runs along the ring and forms two domain walls. Credit photo/©: André Bisig, Institute of Physics, Johannes Gutenberg University Mainz Usage Restrictions The image may be used only in conjunction with the press release or parts of it. 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.