Magnetic and exchange studies in amorphous <InlineEquation ID="Equ1"> <EquationSource Format="TEX">$\mathsf{Co_{80-x}Ho_xB_{20}}$</EquationSource> </InlineEquation> alloys

Amorphous Co<Subscript>80-x </Subscript>Ho<Subscript> x </Subscript>B<Subscript>20</Subscript> alloys were prepared by melt spinning technique and their magnetic properties have been studied. The magnetic compensation occurs at about x=8. Antiferromagnetic coupling between Co and Ho prevails and breaks at relatively high-fields. The mean field theory has been used to explain the temperature dependence of the magnetization. The exchange interactions between Co-Co and Co-Ho atom pairs have been evaluated. Copyright Springer-Verlag Berlin/Heidelberg 2003