1 : 1 Ca²⁺:Cu²⁺ A‐site Order in a Ferrimagnetic Double Double Perovskite

Abstract

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Anisotropic Thermal Expansion and a Second-Order Charge Order Transition in the Ferrimagnetic Dy2CuZnMn4O12 Perovskite with Triple A-Site Cation Ordering

“…Therefore, we assumed the distribution of Cu 2+ and Zn 2+ based on their coordination preferences: Zn 2+ cations have a strong preference for tetrahedral sites (among tetrahedral and square-planar ones) while Cu 2+ cations have a strong preference for square-planar sites. 18 We note that CaZnV 2 O 6 19 and CaCuFeReO 6 20 were recently prepared, where Zn 2+ and Cu 2+ cations are located in both square-planar (A′) and tetrahedral (A″) sites. However, these compounds were stabilized at much higher pressures of 12 and 15.5 GPa, respectively, and they were not stable at 6 GPa.…”

Magnetism in Cation-Ordered Multicomponent Oxide Perovskites

“…In this backdrop, the report 15 of the synthesis of CaCuFeReO 6 (CCFR-d) in the double double perovskite structure in the same chemical system as quadruple perovskitestructured CaCu 3 Fe 2 Re 2 O 12 (CCFR-q), 16 together with the report of the synthesis of the sister double double perovskite compound CaMnFeReO 6 (CMFR), 17 opens up the rare opportunity of studying magnetism in varied chemical and structural environments. While the connectivity and chemical composition of the B sublattice remain the same in all three compounds with rock salt ordering of FeO 6 and ReO 6 octahedra, the connectivity and/or chemical composition of the A sublattice are distinct in three cases.…”