Synthesis, Structure, and Compositional Tuning of the Layered Oxide Tellurides Sr₂MnO₂Cu_{2- x}Te₂ and Sr₂CoO₂Cu₂Te₂.

ABSTRACT: The synthesis and structure of two new transition metal oxide tellurides, Sr₂MnO₂Cu_1.82(2)Te₂ and Sr₂CoO₂Cu₂Te₂, are reported. Sr₂CoO₂Cu₂Te₂ with the purely divalent Co²⁺ ion in the oxide layers has magnetic ordering based on antiferromagnetic interactions between nearest neighbors and appears to be inert to attempted topotactic oxidation by partial removal of the Cu ions. In contrast, the Mn analogue with the more oxidizable transition metal ion has a 9(1)% Cu deficiency in the telluride layer when synthesized at high temperatures, corresponding to a Mn oxidation state of +2.18(2), and neutron powder diffraction revealed the presence of a sole high

SUBMITTER: Blandy JN 

PROVIDER: S-EPMC7007212 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature