On the frequency dependence of the ferro-to-spin-glass transition of amorphous Fe-rich Fe-Zr

Spin glass-like phase below ∼210 K in magnetoelectric gallium ferrite

“…These frequency independent peaks termed as Hopkinson peaks are typical feature in many ferromagnetic materials. 17 With further lowering of temperature, another set of weak and broad peaks (corresponding to spin freezing temperature T f $ 210 K) appear in both v 0 and v 00 plots (Figs. 1(b) and 1(c)).…”