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Topological frustrations in Mn films on Fe(001)

Wulfhekel, Wulf; Schlickum, Uta; Kirschner, Jürgen

Abstract:
The high lateral resolution of spin-polarized scanning tunneling microscopy allows new insights into the spin structure of antiferromagnets on the nanometer range. We demonstrate the capability to image a well-defined in-plane component of the sample spin polarization and discuss the spin structure of antiferromagnetic bet Mn in contact with the ferromagnetic Fe(001) substrate. Mn atoms couple ferromagnetically within a Mn atomic plane, while normal to the surface a layer-wise antiferromagnetic order was found. Magnetic frustrations arise in this system at Fe substrate steps at the interface, where topologically induced 180 domain walls are created in the Mn film. A clear widening of the enforced domain walls with increasing Mn thickness was found. The measured widths could be fitted with a linear function and are explained on the basis of a Heisenberg model.© 2005 Wiley-Liss, Inc.


Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2005
Sprache Englisch
Identifikator DOI: 10.1002/jemt.20150
ISSN: 0741-0581
KITopen ID: 1000053602
Erschienen in Microscopy Research and Technique
Band 66
Heft 2-3
Seiten 105-116
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