Abstract
A randomly dilute antiferromagnetic system with spinel structure ZnCr2xGa2-2xO4 (octahedral magnetic sublattice) was studied by means of low-field susceptibility measurements, neutron diffraction experiments and Mossbauer spectra. With decreasing x the antiferromagnetic structure existing for x=1 (TN=13K) is progressively perturbed and a spin-glass phase is established for 0.40<or=x<0.85 as a consequence of the frustration inherent in the octahedral spinel sublattice with only antiferromagnetic interactions.
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