Observation of vacuum tunneling of spin-polarized electrons with the scanning tunneling microscope
- 9 July 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 65 (2), 247-250
- https://doi.org/10.1103/physrevlett.65.247
Abstract
Vacuum tunneling of spin-polarized electrons from a ferromagnetic tip into a Cr(001) single crystal has been observed by means of a scanning tunneling microscope (STM) operated in UHV. Topographic STM images of the Cr(001) surface using a tungsten tip confirm the model of topological antiferromagnetism between ferromagnetic terraces separated by monatomic steps of 0.144 nm height. With tips, the measured step-height values alternate around the mean value of 0.144 nm due to an additional contribution from spin-polarized-electron tunneling.
Keywords
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