title: Spin-Orbit Coupling Controlled Ground State in the Ir(V) Perovskites A2ScIrO6(A = Ba or Sr).
abstract: The structural and magnetic properties of the two Ir(V) perovskites Ba2ScIrO6and Sr2ScIrO6were established. The structures were refined using a combined neutron and synchrotron data set. At room temperature the former has a cubic structure in space group Fm3̅m with a = 8.1450(3) Å, and the latter is monoclinic in P21/n with a = 5.6606(3) Å, b = 5.6366(3) Å, c = 7.9720(4) Å, and β = 89.977(5)°. Magnetization measurements show both oxides have magnetic moments close to zero as a consequence of strong spin-orbit coupling that results in a Jeff≈ 0 ground state. The distortion of the IrO6octahedra in Sr2ScIrO6is insufficient to generate crystal field splitting strong enough to quench the spin-orbit coupling.
authors.affiliation: School of Chemistry, The University of Sydney , Sydney, NSW 2006, Australia.
authors.forename: Paula
authors.initials: P
authors.lastname: Kayser
authors.affiliation: School of Chemistry, The University of Sydney , Sydney, NSW 2006, Australia.
authors.forename: Brendan J
authors.identifier: http://orcid.org/0000-0002-7187-4579
authors.initials: BJ
authors.lastname: Kennedy
authors.affiliation: School of Chemistry, The University of Sydney , Sydney, NSW 2006, Australia.
authors.forename: Ben
authors.initials: B
authors.lastname: Ranjbar
authors.affiliation: Australian Synchrotron , 800 Blackburn Road, Clayton, Victoria 3168, Australia.
authors.forename: Justin A
authors.initials: JA
authors.lastname: Kimpton
authors.affiliation: Australian Nuclear Science and Technology Organization , Lucas Heights, New South Wales 2234, Australia.
authors.forename: Maxim
authors.identifier: http://orcid.org/0000-0003-2366-5809
authors.initials: M
authors.lastname: Avdeev