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Spin configuration in a frustrated ferromagnetic/antiferromagnetic thin-film system
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics.
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2007 (English)In: Nanotechnology, ISSN 0957-4484, E-ISSN 1361-6528, Vol. 18, no 23, 235702- p.Article in journal (Refereed) Published
Abstract [en]

We have studied the magnetic configuration in ultrathin antiferromagnetic Mn films grown around monoatomic steps on an Fe( 001) surface by spin-polarized scanning tunnelling microscopy/spectroscopy and ab initio-parameterized self-consistent real-space tight-binding calculations in which the spin quantization axis is independent for each site, thus allowing noncollinear magnetism. Mn grown on Fe( 001) presents a layered antiferromagnetic structure. In the regions where the Mn films overgrows Fe steps the magnetization of the surface layer is reversed across the steps. Around these defects a frustration of the antiferromagnetic order occurs. Due to the weakened magnetic coupling at the central Mn layers, the amount of frustration is smaller than in Cr, and the width of the wall induced by the step does not change with the thickness, at least for coverages up to seven monolayers.

Place, publisher, year, edition, pages
2007. Vol. 18, no 23, 235702- p.
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-144907DOI: 10.1088/0957-4484/18/23/235702ISI: 000246590700016OAI: oai:DiVA.org:uu-144907DiVA: diva2:394672
Available from: 2011-02-03 Created: 2011-02-03 Last updated: 2011-02-03Bibliographically approved

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