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Magnetic properties of the Cr(0 0 1) surface studied by spin-polarized scanning tunneling spectroscopy |
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| Authors: | M Kleiber M Bode R Ravli N Tezuka R Wiesendanger |
| Institution: | Institute of Applied Physics and Microstructure Research Center, University of Hamburg, Jungiusstrasse 11, D-20355 Hamburg, Germany |
| Abstract: | The magnetic properties of the Cr(0 0 1) surface have been studied by spin-polarized scanning tunneling spectroscopy (SP-STS). Spatially resolved mapping of the spectroscopic dI/dU signal at an energy close to the spin-polarized Cr(0 0 1) surface state allows the confirmation of the topological antiferromagnetic order of the Cr(0 0 1) surface. It is shown that the presence of screw dislocations leads to the formation of domain walls which exhibit a width of 120–170 nm. A long-period modulation of the SP-STS signal was not observed indicating that the bulk spin-density wave is modified at the surface due to symmetry breaking. |
| Keywords: | Micromagnetic structures Surface magnetism Antiferromagnetism Domain wall width Spin density waves |
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