Changed Composition of the Crystal (IMAGE) University of Groningen Caption Two mirror-image domains (terbium in green, manganese in red, oxygen not shown) meet at a domain wall, where terbium atoms are squeezed out and replaced by manganese (red cross). Credit (c) <i>Nature</i> Usage Restrictions The image may only be used with appropriate caption and 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.