Structural study of the effect of barium doping in Sr3Ru2O7

The capability of systematically tuning electronic properties of strongly correlated electron systems is key to unraveling the mechanisms underlying the observed physics. Sr3Ru2O7 has been widely studied due to a highly correlated zero field ground state dominated by magnetic interactions giving rise to a quantum phase transition and formation of an unconventional high-field phase. Its structure consists of bilayers of RuO6 octahedra separated by SrO layers offering an ideal test case for the control of physical properties by purely structural means: isovalent Ba substitution of Sr allows for control of the RuO6 octahedra arrangements without directly affecting the electronic structure in the bilayers. Having synthesized and characterised a range of Ba doped Sr3Ru2O7 samples we require high resolution HRPD data to directly relate the physical properties to the detailed crystal structure.