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Probing the local distortion of Fe sites in Fe3 O4 thin films using enhanced symmetry selection in XMLD

DOI: 10.1103/PhysRevMaterials.4.024415 DOI Help

Authors: Hebatalla Elnaggar (Debye Institute for Nanomaterials Science) , Rupan Wang (Debye Institute for Nanomaterials Science) , Mahnaz Ghiasi (Debye Institute for Nanomaterials Science) , Maria Yañez (University of Guadalajara) , Mario U. Delgado-jaime (University of Guadalajara) , Mai Hussein Hamed (Peter-Grünberg-Institut, Forschungszentrum Jülich GmbH; Helwan University) , Amélie Juhin (Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, UMR CNRS 7590, Université Pierre et Marie Curie) , Sarnjeet S. Dhesi (Diamond Light Source) , Frank De Groot (Debye Institute for Nanomaterials Science)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Materials , VOL 4

State: Published (Approved)
Published: February 2020
Diamond Proposal Number(s): 17588

Abstract: Magnetite ( Fe 3 O 4 ) thin-films are among the most stimulating systems for electronic applications, in particular given that their electric and magnetic properties can be controlled by substrate strain. Here we investigate the electronic structure of a 38 nm Fe 3 O 4 / SrTiO 3 ( 001 ) thin-film by a unique set of x-ray magnetic linear dichroism (XMLD) measurements. We show that it is only possible to uncover the orbital character of the Fe sites in Fe 3 O 4 by a systematic analysis of the XMLD angular distribution. The local symmetry of the Fe 2 + B site in the thin-film is found to be trigonally distorted. Our results highlight that the combination of state-of-the-art XMLD measurements and theoretical simulations is indispensable for investigating the electronic structure of oxide thin-films and heterostructures.

Journal Keywords: Electronic structure; Mott insulators; Strongly correlated systems; Cluster methods; Epitaxy; Many-body techniques; X-ray magnetic circular dichroism; X-ray magnetic linear dichroism

Subject Areas: Materials, Physics


Instruments: I06-Nanoscience