2025/01/08 by Lovesey, S W
#FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el)
paper · doi:10.48550/arxiv.2501.04414
Of all the oxides of osmium, Ba2NaOsO6 is the only one with a substantial ferromagnetic moment. A fresh theoretical study of bulk magnetic properties of the double perovskite is accomplished with an appropriate space group, and an atomic model of a Kramers doublet formed by the single osmium d-electron. It possesses symmetry demanded by the Wyckoff position assigned to Os in a canted ferromagnet. Whereupon, magnetic moments in the paramagnetic and magnetically ordered states of Ba2NaOsO6 are unified. Analytic x-ray magnetic dichroic signals (XMCD) at osmium L2 and L3 absorption edges are presented, and shown to agree with hitherto unexplained recent measurements.