MSMA Twinning (IMAGE) University of Pittsburgh Caption Examples of twinning (colorful bands) in magnetic shape-memory alloy single crystals. During actuation, some twins will grow and some will shrink depending on the direction of the applied magnetic field. This will result in an overall shape change and stroke useful in actuators Credit Swanson School of Engineering/Markus Chmielus 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.