Origin of magnetism in a supposedly nonmagnetic osmium oxide

DOI: 10.1103/PhysRevLett.133.066501

Authors: S. Agrestini (Diamond Light Source) , F. Borgatti (Istituto per lo Studio dei Materiali Nanostrutturati, Consiglio Nazionale delle Ricerche (CNR-ISMN)) , P. Florio (Politecnico di Milano) , J. Frassineti (Università di Bologna) , D. Fiore Mosca (Ecole Polytechnique, CNRS, Institut Polytechnique de Paris) , Q. Faure (ESRF, The European Synchrotron) , B. Detlefs (ESRF, The European Synchrotron) , C. j. Sahle (ESRF, The European Synchrotron) , S. Francoual (Deutsches Elektronen-Synchrotron (DESY)) , J. Choi (Diamond Light Source) , Mirian Garcia-Fernandez (Diamond Light Source) , K.-J. Zhou (Diamond Light Source) , V. f. Mitrović (Brown University) , P. m. Woodward (The Ohio State University) , G. Ghiringhelli (Politecnico di Milano) , C. Franchini (Università di Bologna) , F. Boscherini (Università di Bologna) , S. Sanna (Università di Bologna) , M. Moretti Sala (Politecnico di Milano)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Letters , VOL 133

State: Published (Approved)
Published: August 2024

Abstract: A supposedly nonmagnetic 5⁢𝑑1 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 5⁢𝑑 𝑡2⁢𝑔 and 𝑒𝑔 orbitals, covalency raises the 5⁢𝑑 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 5⁢𝑑1 ions. Our results provide direct evidence of elusive Jahn-Teller distortions, hinting at a strong electron-lattice coupling.

Journal Keywords: Electronic structure; Magnetic susceptibility; Spin-orbit coupling; Polycrystalline materials; Single crystal materials; Strongly correlated systems; Resonant inelastic x-ray scattering; X-ray magnetic circular dichroism

Subject Areas: Materials, Physics


Instruments: I21-Resonant Inelastic X-ray Scattering (RIXS)

Other Facilities: ID20 at ESRF; P09 at PETRA III

Added On: 07/08/2024 13:45

Documents:
PhysRevLett.133.066501.pdf

Discipline Tags:

Physics Hard condensed matter - structures Magnetism Materials Science

Technical Tags:

Scattering Resonant Inelastic X-ray Scattering (RIXS)