YCo2: intrinsic magnetic surface of a paramagnetic bulk material.
Here we report on results of a spin-resolved photoelectron spectroscopic (SRPES) study of YCo2 thin films (150 A-thick) grown on a W(110) substrate. The films were prepared by co-deposition of stoichiometric amounts of Y and Co onto a clean W surface followed by thermal annealing leading to (2x2) overstructure with respect to W(110) in the low-energy electron diffraction pattern indicated formation of a structurally ordered YCo2(111) surface. While no clear spin asymmetry was observed for bulk-sensitive SRPES data taken at hnu=1253.6 eV, the more surface-sensitive SRPES data obtained at hnu=21.2 eV photon energy revealed a clear spin-asymmetry probing the validity of the recent theoretical prediction.
Institut für Festkörperphysik, Technische Universität Dresden, 01062 Dresden, Germany.
Yu S
YS
Dedkov
C
C
Laubschat
S
S
Khmelevskyi
J
J
Redinger
P
P
Mohn
M
M
Weinert