Noncollinear Ordering of the Orbital Magnetic Moments in Magnetite

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; F. M. F. de Groot

doi:10.1103/PhysRevLett.123.207201

Noncollinear Ordering of the Orbital Magnetic Moments in Magnetite

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
, F. M. F. de Groot

extern

Research output: Contribution to journal › Article › Academic › peer-review

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.

Original language	English
Article number	20720
Journal	Physical Review Letters
Volume	123
Issue number	20
DOIs	https://doi.org/10.1103/PhysRevLett.123.207201
Publication status	Published - 12 Nov 2019

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Elnaggar, H., Sainctavit, P., Juhin, A., Lafuerza, S., Wilhelm, F., Rogalev, A., Arrio, M. .-A., Brouder, C., van der Linden, M., Kakol, Z., Sikora, M., Haverkort, M. W., Glatzel, P., & de Groot, F. M. F. (2019). Noncollinear Ordering of the Orbital Magnetic Moments in Magnetite. Physical Review Letters, 123(20), Article 20720. https://doi.org/10.1103/PhysRevLett.123.207201

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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.",

author = "H. Elnaggar and Ph. Sainctavit and A. Juhin and S. Lafuerza and F. Wilhelm and A. Rogalev and Arrio, \{M. -A.\} and Ch. Brouder and \{van der Linden\}, M. and Z. Kakol and M. Sikora and Haverkort, \{M. W.\} and P. Glatzel and \{de Groot\}, \{F. M. F.\}",

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doi = "10.1103/PhysRevLett.123.207201",

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AU - Elnaggar, H.

AU - Sainctavit, Ph.

AU - Juhin, A.

AU - Lafuerza, S.

AU - Wilhelm, F.

AU - Rogalev, A.

AU - Arrio, M. -A.

AU - Brouder, Ch.

AU - van der Linden, M.

AU - Kakol, Z.

AU - Sikora, M.

AU - Haverkort, M. W.

AU - Glatzel, P.

AU - de Groot, F. M. F.

PY - 2019/11/12

Y1 - 2019/11/12

N2 - 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.

AB - 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.

U2 - 10.1103/PhysRevLett.123.207201

DO - 10.1103/PhysRevLett.123.207201

M3 - Article

SN - 0031-9007

VL - 123

JO - Physical Review Letters

JF - Physical Review Letters

IS - 20

M1 - 20720

ER -

Noncollinear Ordering of the Orbital Magnetic Moments in Magnetite

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