Magnetic phase diagrams of dysprosium iron garnet (DyIG) in high dc fields

Abstract Magnetisation measurements have been performed on spherical single crystals of dysprosium iron garnet (Dy 3 Fe 5 O 12 ) in high dc magnetic fields up to 16 T applied along the three principal crystallographic directions 〈111〉, 〈110〉 and 〈100〉. The magnetic phase transitions near the inversion (or compensation) temperature T I between the collinear and the field induced canted magnetic structures are observed and the different associated magnetic phase diagrams precisely determined in the ( H , T ) plane. The mean exchange field acting on the Dy ions and the effective anisotropy field are deduced to be (12.9±0.2) T and (1.2±0.1) T respectively. Above 228.2±0.5 K, only the collinear magnetic phase exists for all the directions. These results are compared to previous high pulsed magnetic fields data.