Abstract
The disordered spinel system, Zn 0.5Co 0.5FeCrO 4 has been investigated using the low field magnetization and ac susceptibility measurements. From the present results it appears that this system orders into a cluster spin glass state with the magnetic moments of the ferrimagnetic clusters randomly frozen. Compared to the Ni and Co zinc ferrites with the same magnetic dilution, introduction of Cr into the B sites appears to increase the frustration and disorder dramatically. The predicted phase diagrams for the ordering in diluted magnetic spinels do not describe the magnetic behaviour of this system, presumably due to the disorder in the B sublattice in addition to the dilution in the A sublattice.
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