Heavy Rare-Earth, Co-Substituted Amorphous TbFe Films for Magneto-Optical Recording

The dynamic characteristics such as carrier-to-noise ratio (CNR) of single-layer TbDyFeCo films were studied along with films in which the rare-earth elements Ho and Er were substituted for Dy. The θ
_K
values of TbDyFeCo films were sufficiently large for high rate read/write applications. The Ϙ
_K
and the H
_c
values of the TbHoFeCo and TbErFeCo films fell within the range of conventional usage.