Exploring Magnetic Ordering in Sr3Ir2O7

Iridium oxide members of the Ruddlesden-Popper series have generated a great deal of interest recently due to their novel Mott insulating phases within these 5$d$-electron systems. These surprising Mott phases have been proposed to form due to a delicate interplay between spin orbit coupling effects and electronic correlation [1]. Here we present measurements probing the nature of the spin correlations and charge behavior in the bilayer variant of the Ruddlesden-Popper series, Sr$_{3}$Ir$_{2}$O$_{7}$. Our neutron scattering results reveal an antiferromagnetic spin structure and will be discussed in parallel with transport and bulk magnetization measurements detailing the electronic behavior in this material. \\[4pt] [1] B. J. Kim et al., Phys. Rev. Lett. 101, 076402 (2008).