Dresden 2003 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 43: Symposium Nitride
HL 43.3: Vortrag
Donnerstag, 27. März 2003, 15:30–16:00, POT/81
Atomic-scale Spin-polarized Scanning Tunneling Microscopy of the Surface Magnetic Structure of Mn3N2 (010) — •Arthur Smith1, Haiqiang Yang1, Margarita Prikhodko2, and Walter Lambrecht2 — 1Condensed Matter and Surface Science Program, Department of Physics and Astronomy, Ohio University, Athens, OH 45701 — 2Department of Physics, Case Western Reserve University, Cleveland, OH 44106
The investigations of magnetic structures down to atomic scale in real space are realized by recent developments of spin-polarized scanning tunneling microscopy (SP-STM)1,2. I will discuss the antiferromagnetic structure of Mn3N2 (010) investigated using SP-STM. The surface is prepared by molecular beam epitaxy. STM images reveal a row structure with spacing 6.06 Å. Using magnetic-coated tips, a modulation in the height of the rows is observed, resulting in a super-period of 12.12 Å, indicating the surface magnetic ordering. A method is demonstrated for separating the spatially correlated magnetic and non-magnetic components. The magnetic component agrees well with a model utilizing integrated local spin density of states calculated from first-principles. 1 S. Heinze, et al, Science 288, 1805 (2000) 2 H. Yang, et al, Phys. Rev. Lett. 89, 226101 (2002)