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MA: Fachverband Magnetismus

MA 19: POSTER Ia

MA 19.67: Poster

Dienstag, 17. März 2015, 09:30–13:00, Poster A

Investigation of the chiral spin structure of the double layer Fe on Ir(111) using SP-STM in a 3D vector magnetic field system — •Aurore Finco, Pin-Jui Hsu, Lorenz Schmidt, Andre Kubetzka, Kirsten von Bergmann, and Roland Wiesendanger — Department of Physics, University of Hamburg, Jungiusstr. 11, 20355 Hamburg, Germany

The detailed magnetic structure of the second atomic layer Fe on Ir(111) has been investigated with spin-polarized scanning tunneling microscopy (SP-STM). The second layer Fe exhibits reconstruction lines along which cycloidal spin spirals are guided. The low temperature measurements in a 3D-vector magnetic field system on the three rotational domains have revealed that these spirals have a unique rotational sense. In addition, no magnetic phase transition occurred when an out-of-plane magnetic field was applied up to 9T. The chirality of this complex spin structure indicates that the Dzyaloshinskii-Moriya interaction plays a crucial role in its formation.