Structural and magnetic characterisation of the novel spin frustrated double perovskite Sr2ScMoO6

• The novel perovskite Sr2ScMoO6 has been synthesised.
• Disorder of the Mo5+ and Sc3+ cations is observed.
• There is no evidence of a magnetic transition down to 6 K.
• There is likely frustrated short range magnetic order or spin liquid behaviour.

A novel Mo5+ double perovskite, Sr2ScMoO6, has been synthesised. This material crystallises in the tetragonal I4/m symmetry space group and considerable cation disorder between Sc3+ and Mo5+ is observed. Magnetic susceptibility measurements show no evidence of a magnetic transition down to 6 K and no evidence of the valence bond glass state previously reported for A2YMoO6 (A=Ba, Sr). The inverse susceptibility data cannot be fit to the Curie–Weiss law at any temperature range between 6 and 300 K. This deviation from Curie–Weiss law suggests that strong antiferromagnetic correlations are still present in Sr2ScMoO6.

A novel double perovskite Sr2ScMoO6 has been synthesised which has corner sharing MoO6 and ScO6 octahedra. The Sr2+ cations reside in the cavities and exhibit anisotropic thermal motion. There is no evidence of magnetic order down to 6 K.Figure optionsDownload as PowerPoint slide