Origin of Magnetism in a Supposedly Nonmagnetic Osmium Oxide

S. Agrestini (Corresponding author), F. Borgatti, P. Florio, J. Frassineti, D. Fiore Mosca, Q. Faure, B. Detlefs, C. J. Sahle, S. Francoual, J. Choi, M. Garcia-Fernandez, K.-J. Zhou, V. F. Mitrović, P. M. Woodward, G. Ghiringhelli, C. Franchini, F. Boscherini, S. Sanna, M. Moretti Sala (Corresponding author)

Publications: Contribution to journalArticlePeer Reviewed

Abstract

A supposedly nonmagnetic 5d1 double perovskite oxide is investigated by a combination of spectroscopic and theoretical methods, namely, resonant inelastic x-ray scattering, x-ray absorption spectroscopy, magnetic circular dichroism, and multiplet ligand-field calculations. We found that the large spin-orbit coupling admixes the 5d t2g and eg orbitals, covalency raises the 5d population well above the nominal value, and the local symmetry is lower than Oh. The obtained electronic interactions account for the finite magnetic moment of Os in this compound and, in general, of 5d1 ions. Our results provide direct evidence of elusive Jahn-Teller distortions, hinting at a strong electron-lattice coupling.

Original languageEnglish
Article number066501
Number of pages7
JournalPhysical Review Letters
Volume133
Issue number6
DOIs
Publication statusPublished - 9 Aug 2024
Externally publishedYes

Austrian Fields of Science 2012

  • 103015 Condensed matter
  • 103017 Magnetism

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