EuxSr1−xTe: Spin-glass behavior in a diluted antiferromagnet

Spin-glass behavior in the insulating diluted ferromagnet ${\mathrm{Eu}}_{\mathrm{x}}$ ${\mathrm{Sr}}_{1\mathrm{-}\mathrm{x}}$S is believed to originate from randomly distributed competing exchange interactions to nearest and next-nearest neighbors. The indications of spin-glass behavior in a similar diluted system with dominating antiferromagnetic interactions, ${\mathrm{Eu}}_{\mathrm{x}}$ ${\mathrm{Sr}}_{1\mathrm{-}\mathrm{x}}$Te, have been investigated in detail in order to establish a magnetic phase diagram and to compare the spin-glass properties of the diluted antiferromagnet with those of the diluted ferromagnet.