TY  - JOUR
AU  - Schöneberg, J.
AU  - Otte, F.
AU  - Néel, N.
AU  - Weismann, A.
AU  - Mokrousov, Y.
AU  - Kröger, J.
AU  - Berndt, R.
AU  - Heinze, S.
TI  - Ballistic Anisotropic Magnetoresistance of Single-Atom Contacts
JO  - Nano letters
VL  - 16
IS  - 2
SN  - 1530-6992
CY  - Washington, DC
PB  - ACS Publ.
M1  - FZJ-2016-07498
SP  - 1450 - 1454
PY  - 2016
AB  - Anisotropic magnetoresistance, that is, the sensitivity of the electrical resistance of magnetic materials on the magnetization direction, is expected to be strongly enhanced in ballistic transport through nanoscale junctions. However, unambiguous experimental evidence of this effect is difficult to achieve. We utilize single-atom junctions to measure this ballistic anisotropic magnetoresistance (AMR). Single Co and Ir atoms are deposited on domains and domain walls of ferromagnetic Fe layers on W(110) to control their magnetization directions. They are contacted with nonmagnetic tips in a low-temperature scanning tunneling microscope to measure the junction conductances. Large changes of the magnetoresistance occur from the tunneling to the ballistic regime due to the competition of localized and delocalized d-orbitals, which are differently affected by spin–orbit coupling. This work shows that engineering the AMR at the single atom level is feasible
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000370215200093
DO  - DOI:10.1021/acs.nanolett.5b05071
UR  - https://juser.fz-juelich.de/record/825002
ER  -