Journal
NATURE MATERIALS
Volume 5, Issue 6, Pages 477-481Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nmat1646
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The search for uncompensated magnetic moments on antiferromagnetic surfaces is of great technological importance as they are responsible for the exchange-bias effect that is widely used in state-of-the-art magnetic storage devices. We have studied the atomic spin structure of phase domain walls in the antiferromagnetic Fe monolayer on W(001) bymeans of spin-polarized scanning tunnelling microscopy and Monte Carlo simulations. The domain wall width only amounts to 6 - 8 atomic rows. Although walls oriented along < 100 > directions are found to be fully compensated, detailed analysis of < 110 >-oriented walls reveals an uncompensated perpendicular magnetic moment. Our result represents a major advance in the field of antiferromagnetism, and may lead to a better understanding of the magnetic interaction between ferromagnetic and antiferromagnetic materials.
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