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 (Dy3Fe5O12) 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 TI 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.