Magnetisation and magnetostriction measurements have been performed on the ferrimagnetic ErxY1-,Fez (z = 1.0, 0.8, 0.6 and 0.4) compounds. All investigated compounds have a compensation point in the temperature range between 100 K and 500 K. The strength of the Er-Fe interaction has been estimated to be equal to 138 T/pB, equivalent to a value for the R-Fe coupling parameter of about 7.8 K.
