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Issue 7, 2013
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Photoemission electron microscopy study of sub-200 nm self-assembled La0.7Sr0.3MnO3 epitaxial islands

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Abstract

The chemical composition and the magnetic structure of individual La0.7Sr0.3MnO3 (LSMO) ferromagnetic manganite epitaxial nanostructures less than 200 nm in width are explored using Photoemission Electron Microscopy (PEEM). X-ray absorption spectra (XAS) provide separate information on the surface and the bulk composition of the nanoislands and give evidence of Mn2+ present on the surface of otherwise stoichiometric nanostructures. Ferromagnetic domains less than 70 nm are resolved using X-ray magnetic circular dichroism (XMCD), which allows for the detection of magnetic vortex states in both (001)LSMO square and (111)LSMO triangular manganite nanoislands. The evolution of single nanostructures under an in-plane magnetic field is seen to depend on the specific nanoisland size and geometry. In particular, PEEM XMCD imaging allows detecting opposite chiralities as well as a variety of magnetization behaviors for different nanoislands.

Graphical abstract: Photoemission electron microscopy study of sub-200 nm self-assembled La0.7Sr0.3MnO3 epitaxial islands

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Publication details

The article was received on 26 Oct 2012, accepted on 03 Feb 2013 and first published on 05 Feb 2013


Article type: Paper
DOI: 10.1039/C3NR33346A
Nanoscale, 2013,5, 2990-2998

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    Photoemission electron microscopy study of sub-200 nm self-assembled La0.7Sr0.3MnO3 epitaxial islands

    J. Zabaleta, S. Valencia, F. Kronast, C. Moreno, P. Abellán, J. Gázquez, H. Sepehri-Amin, F. Sandiumenge, T. Puig, N. Mestres and X. Obradors, Nanoscale, 2013, 5, 2990
    DOI: 10.1039/C3NR33346A

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