Magnetic contrast at spin-flip excitations: an advanced x-ray spectroscopy tool to study magnetic-ordering

The determination of the local orientation and magnitude of the magnetization in spin textures plays a pivotal role in understanding and harnessing magnetic properties for technological applications. Here, we show that by employing the polarization dependence of resonant inelastic X-ray scattering (...

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Main Authors: Elnaggar, Hebatalla (Author) , Haverkort, Maurits W. (Author)
Format: Article (Journal)
Language:English
Published: September 9, 2019
In: ACS applied materials & interfaces
Year: 2019, Volume: 11, Issue: 39, Pages: 36213-36220
ISSN:1944-8252
DOI:10.1021/acsami.9b10196
Online Access:Verlag, Volltext: https://doi.org/10.1021/acsami.9b10196
Verlag: https://doi.org/10.1021/acsami.9b10196
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Author Notes:Hebatalla Elnaggar, Ru-Pan Wang, Sara Lafuerza, Eugenio Paris, Yi Tseng, Daniel McNally, Alexander Komarek, Maurits Haverkort, Marcin Sikora, Thorsten Schmitt and Frank M. F. de Groot

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520 |a The determination of the local orientation and magnitude of the magnetization in spin textures plays a pivotal role in understanding and harnessing magnetic properties for technological applications. Here, we show that by employing the polarization dependence of resonant inelastic X-ray scattering (RIXS), we can directly probe the spin ordering with chemical and site selectivity. Applied on the prototypical ferrimagnetic mixed-valence system, magnetite ([Fe3+]A[Fe3+,Fe2+]BO4), we can distinguish spin-flip excitations at the A and B antiferromagnetically coupled Fe3+ sublattices and quantify the exchange field. Furthermore, it is possible to determine the orbital contribution to the magnetic moment from detailed angular dependence measurements. RIXS dichroism measurements performed at spin-flip excitations with nanometer spatial resolution will offer a powerful mapping contrast suitable for the characterization of magnetic ordering at interfaces and engineered spin textures. 
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