Spin glass behaviour in an antiferromagnetic non-frustrated lattice: Sr2FeNbO6perovskite

From magnetic susceptibility and hysteresis loop measurements on the cubic perovskite Sr 2 FeNbO 6 , it is shown that a spin glass transition does exist in this compound which has a non-frustrated lattice, and only antiferromagnetic interactions. This experimental results allows the authors to conclude that lattice frustration is not an essential feature for the spin glass transition in antiferromagnetic insulators. Moreover, it is argued that short-range atomic correlations, which modify the magnetic phase diagrams of the diluted compounds, make this spin glass transition possible.