Dr. Arthur Smith, Professor of Physics and Astronomy, presents an invited talk Nov. 8 in Tsukuba, Japan, at the 12th International Conference on Atomically Controlled Surfaces, Interfaces, and Nanostructures, in conjunction with the 21st International Colloquium on Scanning Probe Microscopy.
Dr. Arthur Smith
Smith will discuss “Spin-polarized scanning tunneling microscopy of complex magnetic systems grown by molecular beam epitaxy.”
“We apply scanning tunneling microscopy with spin polarization to investigate ultra-thin films of complex magnetic systems grown using molecular beam epitaxy,” he writes in the abstract with co-authors Andrada Mandru, Kangkang Wang, and Jeongihm Pak.
Figure: 100×100 nm2 STM image of Fe nanoislands on Mn3N2(001) nanopyramids.
“Systems of interest currently include Fe on manganese nitride and MnGa on gallium nitride. Magnetically-sensitive probes consist of W tips coated with thin Fe layers. In all cases, the freshly deposited sample is transferred through ultra-high vacuum directly into the adjoining SP-STM system. In the case of Mn3N2(001), an unusual orthogonal magnetic anisotropy is found on every 3rd atomic terrace; then, very low coverage of Fe results in an array of 1-atom-high, several nm-wide Fe islands decorating the terraces. Conductance mapping is applied to investigate the electronic & magnetic properties on different neighboring terraces.:”
Smith and Wang were on the cover of Nano Letters with their article “Three-Dimensional Spin Mapping of Antiferromagnetic Nanopyramids Having Spatially Alternating Surface Anisotropy at Room Temperature” in January 2012.
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