Аннотация:An investigation was made of the magnetic properties and hysteresis of dysprosium-yttrium alloy single crystals. The paramagnetic-antiferromagnetic transition temperature varied proportionally to the concentration of dysprosium taken to the power of two-thirds. An anomalous sequence of magnetic transitions in a field was observed for the 69 at. % Dy-31 at. % Y alloy, which also exhibited ”double” hysteresis loops at the antiferromagnetic-ferromagnetic phase transition.