title: Spin filtering in a hybrid ferromagnetic-semiconductor microstructure.
abstract: We fabricated a hybrid structure in which cobalt and permalloy micromagnets produce a local in-plane spin-dependent potential barrier for high-mobility electrons at the GaAs/AlGaAs interface. Spin effects are observed in ballistic transport in the range of tens of mT of the external field and are attributed to switching between Zeeman and Stern-Gerlach modes--the former dominating at low electron densities.
authors.affiliation: Institute of Physics, Polish Academy of Sciences, al Lotników 32/46, 02-668 Warszawa, Poland.
authors.forename: J
authors.initials: J
authors.lastname: Wróbel
authors.forename: T
authors.initials: T
authors.lastname: Dietl
authors.forename: A
authors.initials: A
authors.lastname: Lusakowski
authors.forename: G
authors.initials: G
authors.lastname: Grabecki
authors.forename: K
authors.initials: K
authors.lastname: Fronc
authors.forename: R
authors.initials: R
authors.lastname: Hey
authors.forename: K H
authors.initials: KH
authors.lastname: Ploog
authors.forename: H
authors.initials: H
authors.lastname: Shtrikman