Spin-glass behavior of Zr(FexCr1−x)2 compounds

Abstract The magnetic properties of C14 Laves-phase Zr(FexCr1−x)2 (0.7⩽x⩽0.85) alloys have been investigated. Arrott plots showed evidence of ferromagnetic ordering for alloys with x>0.7 but not for x=0.7. Zero field cooling/field cooling magnetization and Mossbauer spectroscopy data indicated spin-glass-like freezing for the sample with x=0.7 and a reentrant spin-glass behavior for samples with x>0.7. Dynamical behavior of the spin-glass sample (x=0.7) was studied by means of AC susceptibility. Two critical lines described by T f (H)−T(0) ∼H 2/δ were obtained with δ=4.4 and 2.5, respectively.