Abstract
Neutron-powder-diffraction and magnetic-susceptibility measurements have been carried out on samples of the disordered quasi-two-dimensional antiferromagnet (Mn 0.9Mg 0.1)PS 3. Susceptibility measurements reveal a difference between field-cooled and zero-field-cooled measurements, indicative of a possible re-entrant spin-glass transition. This hypothesis is strengthened by a decrease in magnetic Bragg-peak intensity at low temperature, possibly due to the loss of long-range magnetic order as the temperature drops below a spin-glass transition.
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