MAGNETIC PHASE TRANSITIONS IN AMORPHOUS ALLOYS OF RHENIUM WITH HEAVY RARE-EARTH METALS Ke-RE (RE-Gd, Tb, Dy, Ho, Er)

摘要

Magnetic properties of amorphous alloys of rhenium with heavy rare-earth metals Heloo_xREx (RE = Gd, Tb, Dy, Ho, Er) were experimentally investigated in a wide range of rare earth metal concentrations (x = 5 -95at.%) at temperatures T - A.I-300 K. For all alloys, a peak in the temperature dependence of the dynamical magnetic susceptibility x[T) was revealed, which is indicative of a magnetic phase transition. Irreversibility of magnetization indicates a transition to the spin-glass state. The magnetic properties of amorphous Tb were modeled by the Monte Carlo method within the Heisenberg model. The possibility of transition of the system to the spin-glass state was shown