The Magnetocaloric Effect (IMAGE) Helmholtz-Zentrum Dresden-Rossendorf Caption Brought into a magnetic field, the temperature of certain materials changes significantly. Scientists want to use this effect to build eco-friendly cooling devices. Credit HZDR / Juniks 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.