Magnetic transitions and scaling behavior in Gd-rich glasses

The magnetic properties of amorphous alloys with composition ${\mathrm{Gd}}_{\mathrm{x}}$ ${\mathrm{La}}_{72\mathrm{-}\mathrm{x}}$ ${\mathrm{Ga}}_{18}$ ${\mathrm{B}}_{10}$ have been investigated using ac-susceptibilty and dc-magnetization techniques in the temperature range 4.2–300 K. This system shows double-transition behavior for x≳67 and paramagnetic–spin-glass transition behavior for x–spin-glass transitions scale according to the scaling hypothesis, and these results are discussed in some detail. A magnetic phase diagram for this system is obtained from the transition temperatures determined from scaling.