Giant induced anisotropy ruins the magnetocaloric effect in gadolinium

Strips of cold-rolled gadolinium have been produced starting from an ingot of 99.9%-pure metal. The rolling has been carried out in a particularly severe regime, the thickness has been reduced 550 times. The rolled strips feature significantly (several times) diminished ΔTΔT and ΔSΔS effects, as well as a very large induced magnetic anisotropy, estimated to be between 10 and 15 MJ/m3.

► Depression of magnetocaloric effect in gadolinium after severe cold. ► Rolling Giant magnetic anisotropy induced by cold rolling. ► Easy magnetization direction perpendicular to the rolled sheet.