New Buckled Honeycomb Lattice Compound Sr3CaOs2O9 Exhibiting Antiferromagnetism above Room Temperature

Autor:	Thakur, Gohil S., Hansen, T. C., Schnelle, Walter, Guo, Shuping, Janson, Oleg, Brink, Jeroen van den, Felser, Claudia, Jansen, Martin
Rok vydání:	2022
Předmět:	Condensed Matter - Materials Science Condensed Matter - Strongly Correlated Electrons
Zdroj:	Chem. Mater. 34, 4741 (2022)
Druh dokumentu:	Working Paper
DOI:	10.1021/acs.chemmater.2c00740
Popis:	Synthesis, crystal structure and magnetic properties of a new 2:1 ordered triple perovskite Sr3CaOs2O9 are reported. The compound crystallizes in P21/c space group and features a unique buckled honeycomb lattice of osmium. It exhibits long-range antiferromagnetic ordering with a high Neel 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. Comment: 11 pages, 13 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2203.05942 Zobrazit plný text záznamu View this record from Arxiv