Spin-glass like behaviour in a concentrated chromium spinel: Zn0.5Cd0.5Cr2S4

Low field d.c. and a.c. susceptibility measurements are reported for the non magnetically diluted spinel Zn_0.5Cd_0.5Cr₂S₄. A spin-glass like behaviour is observed at low temperature (T_F = 15.4Katv = 198 Hz).This is the result of the presence of competing interactions (ferromagnetic between nearest-neighbours and antiferromagnetic between higher order neighbours) and of the disorder of their distribution due to the substitution between non-magnetic zinc and cadmium ions in the tetrahedral sites of the spinel lattice.