| Autor: |
Eltschka M; Max-Planck-Institut für Festkörperforschung , 70569 Stuttgart, Germany., Jäck B, Assig M, Kondrashov OV, Skvortsov MA, Etzkorn M, Ast CR, Kern K |
| Jazyk: |
angličtina |
| Zdroj: |
Nano letters [Nano Lett] 2014 Dec 10; Vol. 14 (12), pp. 7171-4. Date of Electronic Publication: 2014 Dec 01. |
| DOI: |
10.1021/nl5037947 |
| Abstrakt: |
Probing absolute values of spin polarization at the nanoscale offers insight into the fundamental mechanisms of spin-dependent transport. Employing the Zeeman splitting in superconducting tips (Meservey-Tedrow-Fulde effect), we introduce a novel spin-polarized scanning tunneling microscopy that combines the probing capability of the absolute values of spin polarization with precise control at the atomic scale. We utilize our novel approach to measure the locally resolved spin polarization of magnetic Co nanoislands on Cu(111). We find that the spin polarization is enhanced by 65% when increasing the width of the tunnel barrier by only 2.3 Å due to the different decay of the electron orbitals into vacuum. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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