Noncollinear ordering of the orbital magnetic moments in magnetite
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 orde...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
12 November 2019
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| In: |
Physical review letters
Year: 2019, Volume: 123, Issue: 20 |
| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.123.207201 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevLett.123.207201 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevLett.123.207201 
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| Author Notes: | 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 |
MARC
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| 520 | |a 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. | ||
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