Abstract

The spinel series Cu1−xZnxCr2Se4 has been investigated by AC susceptibility measurements under applied pressures of up to 6kbar. Applied pressure is found to cause a decrease in the antiferromagnetic ordering temperature TN (∼10% at 6kbar). We argue that this is evidence for TN being determined by the near-neighbour coupling which in these materials is ferromagnetic, despite the overall antiferromagnetic order.

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