Modelling of the combined effects of stress and anisotropy on the magnetostriction of Tb/sub 0.3/Dy/sub 0.7/Fe/sub 2/

It is shown how the magnetization and magnetostriction of Tb/sub 0.3/Dy/sub 0.7/Fe/sub 2/ can be calculated using a three-dimensional anisotropy model with fractional occupancies p/sub 1/,. . .p/sub 8/ along each of the easy <111> axes. This model assumes no interaction between the domains. Three-dimensional plots of the sum of anisotropy and field energy are presented which show the locations of energy minima and their evolution as the field strength along the