Origin of Magnetism in a Supposedly Nonmagnetic Osmium Oxide-Reference-Cited by-同舟云学术

Origin of Magnetism in a Supposedly Nonmagnetic Osmium Oxide

Published:2024-08-05 Issue:6 Volume:133 Page:
ISSN:0031-9007
Container-title:Physical Review Letters
language:en
Short-container-title:Phys. Rev. Lett.

Author:

Agrestini S.¹^ORCID,Borgatti F.²^ORCID,Florio P.³,Frassineti J.⁴,Fiore Mosca D.⁵^ORCID,Faure Q.⁶^ORCID,Detlefs B.⁶,Sahle C. J.⁶^ORCID,Francoual S.⁷^ORCID,Choi J.¹,Garcia-Fernandez M.¹^ORCID,Zhou K.-J.¹^ORCID,Mitrović V. F.⁸^ORCID,Woodward P. M.⁹^ORCID,Ghiringhelli G.³^ORCID,Franchini C.⁴^ORCID,Boscherini F.⁴^ORCID,Sanna S.⁴^ORCID,Moretti Sala M.³^ORCID

Affiliation:

1. Diamond Light Source

2. Istituto per lo Studio dei Materiali Nanostrutturati

3. Politecnico di Milano

4. Università di Bologna

5. Institut Polytechnique de Paris

6. The European Synchrotron

7. Deutsches Elektronen-Synchrotron (DESY)

8. Brown University

9. The Ohio State University

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.

Published by the American Physical Society

2024

Funder

European Synchrotron Radiation Facility

Diamond Light Source

Deutsches Elektronen-Synchrotron

Helmholtz-Gemeinschaft

Bundesministerium für Bildung und Forschung

European Commission

National Science Foundation

Materials Research Science and Engineering Center, Harvard University

PETRA