Buckled Honeycomb Lattice Compound Sr3CaOs2O9Exhibiting Antiferromagnetism above Room Temperature

Thakur GS, Hansen TC, Schnelle W, Guo S, Janson O, Van Den Brink J, Felser C, Jansen M (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Chemistry of Materials American Chemical Society

DOI: 10.1021/acs.chemmater.2c00740

Abstract

Synthesis, crystal structure, and magnetic properties of a new 2:1 ordered triple perovskite Sr3CaOs2O9 are reported. The compound crystallizes in a P21/c space group and features a unique buckled honeycomb lattice of osmium. It exhibits long-range antiferromagnetic ordering with a high Néel temperature of 385 K as confirmed by susceptibility, heat capacity, and neutron diffraction measurements and is electrically insulating. This compound is also the first example of a 2:1-ordered osmate perovskite. Theoretical investigations indicate that Sr3CaOs2O9 features a sizeable antiferromagnetic exchange between the puckered planes resulting in a high TN. The magnetic properties of the known compound Sr3CaRu2O9 are elucidated in comparison. It shows antiferromagnetic order below TN ≈ 200 K.

Involved external institutions

Max-Planck-Institut für Chemische Physik fester Stoffe (MPI CPfS) / Max Planck Institute for Chemical Physics of Solids DE Germany (DE) Institute Laue-Langevin (ILL) FR France (FR) Leibniz-Institut für Festkörper- und Werkstoffforschung Dresden e.V. (IFW) / Leibniz Institute for Solid State and Materials Research Dresden DE Germany (DE)

How to cite

APA:

Thakur, G.S., Hansen, T.C., Schnelle, W., Guo, S., Janson, O., Van Den Brink, J.,... Jansen, M. (2022). Buckled Honeycomb Lattice Compound Sr3CaOs2O9Exhibiting Antiferromagnetism above Room Temperature. Chemistry of Materials. https://doi.org/10.1021/acs.chemmater.2c00740

MLA:

Thakur, Gohil S., et al. "Buckled Honeycomb Lattice Compound Sr3CaOs2O9Exhibiting Antiferromagnetism above Room Temperature." Chemistry of Materials (2022).

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