TY - JOUR
T1 - Atomic structure and spin polarization at the apex of tips used in spin-polarized scanning tunneling microscopy
AU - Nagai, Shigekazu
AU - Hata, Koichi
AU - Oka, Hirofumi
AU - Sander, Dirk
AU - Kirschner, Jürgen
PY - 2014/2
Y1 - 2014/2
N2 - To analyze spin-polarized scanning tunneling microscopy (STM) studies quantitatively, we evaluated the atomic structure and spin polarization at the apex of Cr/Wand Fe/W tips using field ion microscopy (FIM) and field-emitted electron polarimetry, respectively. The patchwork-patterned H2- FIM images of the Cr/W tip indicated partially developed Cr planes, and the spin polarization at the surface was 10 ± 3% at room temperature. H 2-FIM images of the Fe/W tip indicate the crystalline order of Fe layers on the W (110) tip, and its spin polarization was 41 ± 2%. These first results allow us to quantify the spin polarization in spin-dependent STM measurements.
AB - To analyze spin-polarized scanning tunneling microscopy (STM) studies quantitatively, we evaluated the atomic structure and spin polarization at the apex of Cr/Wand Fe/W tips using field ion microscopy (FIM) and field-emitted electron polarimetry, respectively. The patchwork-patterned H2- FIM images of the Cr/W tip indicated partially developed Cr planes, and the spin polarization at the surface was 10 ± 3% at room temperature. H 2-FIM images of the Fe/W tip indicate the crystalline order of Fe layers on the W (110) tip, and its spin polarization was 41 ± 2%. These first results allow us to quantify the spin polarization in spin-dependent STM measurements.
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U2 - 10.7567/APEX.7.025204
DO - 10.7567/APEX.7.025204
M3 - Article
AN - SCOPUS:84893283152
SN - 1882-0778
VL - 7
JO - Applied Physics Express
JF - Applied Physics Express
IS - 2
M1 - 025204
ER -