Spin-glass ferromagnetic transitions and critical lines in FexPd82-xSi18 metallic glasses

Magnetization measurements on a series of FexPd82-xSi18 metallic glasses are reported, 9x20. The experimental results resemble closely the predictions of the Sherrington-Kirkpatrick model. Scaling analysis is applied to the Curie and the spin-glass ferromagnetic transitions. It shows that both are similar in nature with, however, different critical exponents. The magnetic phase diagram of amorphous FexPd82-xSi18 is obtained. It differs significantly from the one obtained previously on the basis of low-field dc and ac measurements alone.