Do the Twist (IMAGE) ETH Zurich Department of Physics Caption An international team led by physicist Steven Johnson of ETH Zurich used femtosecond time-resolved X-ray diffraction experiments to uncover what happens what happens when an iron sample is quickly demagnetized upon being hit with a laser pulse. Credit Gregory Stewart/SLAC National Accelerator Laboratory Usage Restrictions None 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.