Magnetic Refrigeration (image) American Institute of Physics Caption The rotation of the HoMn2O5 crystal in a constant magnetic field around 10K changes its temperature, which can be used for the liquefaction of helium and hydrogen. Credit Applied Physics Letters/ M. Balli, et. al Usage Restrictions With proper attribution 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.