Noncollinear ordering of the orbital magnetic moments in magnetite

• Verfasst von: Elnaggar, Hebatalla [VerfasserIn]
• Verfasst von: Haverkort, Maurits W. [VerfasserIn]
• Titel: Noncollinear ordering of the orbital magnetic moments in magnetite
• Verf.angabe: H. Elnaggar, Ph. Sainctavit, A. Juhin, S. Lafuerza, F. Wilhelm, A. Rogalev, M.-A. Arrio, Ch. Brouder, M. van der Linden, Z. Kakol, M. Sikora, M.W. Haverkort, P. Glatzel, and F.M.F. de Groot
• E-Jahr: 2019
• Jahr: 12 November 2019
• Umfang: 6 S.
• Fussnoten: Gesehen am 24.04.2020
• Titel Quelle: Enthalten in: Physical review letters
• Ort Quelle: College Park, Md. : APS, 1958
• Jahr Quelle: 2019
• Band/Heft Quelle: 123(2019,20) Artikel-Nummer 207201, 6 Seiten
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.123.207201
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1696078156

Abstract

The magnitude of the orbital magnetic moment and its role as a trigger of the Verwey transition in the prototypical Mott insulator, magnetite, remain contentious. Using 1s2p resonant inelastic x-ray scattering angle distribution (RIXS-AD), we prove the existence of noncollinear orbital magnetic ordering and infer the presence of dynamical distortion creating a polaronic precursor for the metal to insulator transition. These conclusions are based on a subtle angular shift of the RIXS-AD spectral intensity as a function of the magnetic field orientation. Theoretical simulations show that these results are only consistent with noncollinear magnetic orbital ordering. To further support these claims we perform Fe K-edge x-ray magnetic circular dichroism in order to quantify the Fe average orbital magnetic moment.