Magnetic properties of bulk amorphous TbxFe1−x

Magnetization measurements have been made on four bulk samples (compositions x=.018, .118, .167 and .25) prepared by direct current rapid sputtering. Neutron diffraction measurements show these samples to be amorphous. All four samples are ferrimagnetic; however, the 17% sample is almost completely compensated at temperatures below 100K. With decreasing Tb‐content, the Curie temperatures fall from a maximum of 405K for x=.25 to the value of 245K for x=.018. Anomalously large coercive fields and time dependence magnetizations are present at low temperatures.