Spin-glass like behaviour of (Zn₁₋xMnx)₃As₂

Magnetic properties of the diluted magnetic semiconductor (Zn₁₋xMnx)₃As₂ (ZMA) have been investigated for compositions 0 ≤ x ≤ 0.13 and temperatures 4 K ≤ T ≤ 300 K. Several phenomena typical to spin-glasses were observed: history dependence, maxima in the functions Xdc(T) and Xac and smearing out of the maximum of Xdc(T) in strong fields. For samples with x = 0.10 and 0.13 our data give magnetic freezing temperatures around 200 K which is unusually high for diluted magnetic semiconductorsyesBelgorod State Universit