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The rare-earth compounds R2O2Bi (R=Tb, Dy, Er, Lu, Y) are newly discoveredsuperconductors in the vicinity of a rare-earth magnetic long-range order. Inthis work, we determine the magnetic order of the parent compound Dy2O2Te byneutron scattering as the A-type antiferromagnetic structure below the N\'eeltemperature TN=9.7K. The large staggered magnetic moment 9.4(1) {\mu}B per Dyat T=3.5K lies in the basal ab plane. In a magnetic field, anomalous magneticproperties including the bifurcation between zero-field- and field-coolingmagnetization, a butterfly-shaped magnetic hysteresis, and slow magneticrelaxation emerge, which are related to the field-induced metamagnetictransitions in Dy2O2Te. Our experimental findings could stimulate furtherresearch on the relation between antiferromagnetism and superconductivity inthese rare-earth compounds.

Antiferromagnetic structure and magnetic properties of Dy2O2Te: An isostructural analog of the rare-earth superconductors R2O2Bi