Complex Magnetic Order in Topochemically Reduced Rh(I)/Rh(III) LaM_0.5Rh_0.5O_2.25 (M = Co, Ni) Phases.

ABSTRACT: Topochemical reduction of the cation-disordered perovskite oxides LaCo_0.5Rh_0.5O₃ and LaNi_0.5Rh_0.5O₃ with Zr yields the partially anion-vacancy ordered phases LaCo_0.5Rh_0.5O_2.25 and LaNi_0.5Rh_0.5O_2.25, respectively. Neutron diffraction and Hard X-ray photoelectron spectroscopy (HAXPES) measurements reveal that the anion-deficient phases contain Co¹⁺/Ni¹⁺ and a 1:1 mixture of Rh¹⁺ and Rh³⁺ cations within a disordered array of apex-linked MO₄ square-planar and MO₅ square-based pyramidal coordination sites. Neutron diffraction data indicate that LaCo_0.5Rh_0.5O_2.25 adopt

SUBMITTER: Xu Z 

PROVIDER: S-EPMC9533305 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature