Dmitry Turchinovich and Wentao Zhang (IMAGE) Bielefeld University Caption In the new study together with their international colleagues, Professor Dr Dmitry Turchinovich (left) and Wentao Zhang demonstrate how the ultrafast change of magnetic states can be measured. Credit Photo: Bielefeld University/M.-D. Müller Usage Restrictions The image may only be used with appropriate caption or 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.