Dresden 2011 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 63: Poster II (Surface Magnetism/ Magnetic Imaging/ Topological Insulators/ Spin Structures and Magnetic Phase Transitions/ Graphene/ Magnetic Thin Films/ Magnetic Semiconductors/ Magnetic Half-metals and Oxides/ Spin-dependent Transport/ Spin Excitations and Spin Torque/ Spin Injection and Spin Currents in Heterostructures/ Spintronics/ Magnetic Storage and Applications)

MA 63.31: Poster

Freitag, 18. März 2011, 11:00–14:00, P2

Magnetic structure of one monolayer Fe on Ir(001)-(1$\times$1) — •yiqi zhang, zhen tian, kuntala bhattacharjee, masaki takada, dirk sander, and jürgen kirschner — Max-Planck-Institut für Mikrostrukturphysik,06120 Halle, Germany

The morphology and the magnetic structure of a Fe monolayer (ML) on Ir(001)-(1$\times$1) were investigated using a low-temperature scanning tunneling microscope (STM) operating in the constant-current mode with nonmagnetic and magnetic tips, respectively. Our STM studies with atomic resolution confirm pseudomorphic growth of Fe in the first layer [1,2], where our spin-resolved measurements identify a spin contrast with a 3 $\times$ 3 superstructure. As the magneto-optical Kerr-effect study [2] and the first-principles calculations [3] indicate that the first ML of Fe on Ir(001)-(1$\times$1) tends to order antiferromagnetically, we propose a noncollinear antiferromagnetic spin configuration of the Fe ML based on the spin contrast mapping.

\begin{flushleft} [1] V. Martin, W. Meyer, C. Giovanardi, L. Hammer, K. Heinz, Z. Tian, D. Sander, and J. Kirschner, Phys. Rev. B 76, 205418 (2007). [2] Z. Tian, D. Sander, and J. Kirschner, Phys. Rev. B 79, 024432 (2009).

[3] J. Kudrnovsk\'{y}, F. M\'{a}ca., I. Turek, and J. Redinger, Phys. Rev. B 80, 064405 (2009). \end{flushleft}