2004•Physical Review LettersRequires access

Step-Induced Frustration of Antiferromagnetic Order in Mn on Fe(001)

Uta Schlickum, N. Janke-Gilman, Wulf Wulfhekel, J. Kirschner

Abstract

We studied the spin arrangement in ultrathin antiferromagnetic Mn films in contact with a ferromagnetic Fe(001) substrate using spin-polarized scanning tunneling microscopy. Mn shows a layerwise antiferromagnetic order on Fe(001). In regions where Mn overgrows Fe steps, a frustration of the antiferromagnetic order occurs which is similar to a 180 degrees domain wall. This topologically enforced frustration was studied as a function of Mn thickness. A linear increase of the width of the frustration region with the Mn thickness was found.

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Key concepts: Frustration, Antiferromagnetism, Condensed matter physics, Ferromagnetism, Materials science, Spin (aerodynamics), Scanning tunneling microscope, Domain wall (magnetism)