title: Magnetic linear dichroism in the angular dependence of core-level photoemission from (Ga,Mn)As using hard x rays.
abstract: We report a study of the electronic properties of the ferromagnetic semiconductor (Ga,Mn)As using magnetic linear dichroism in the angular dependence of Mn 2p photoemission under hard x-ray excitation. Bulk plasmon loss satellites demonstrate that the probed Mn ions are incorporated deep within the GaAs lattice, while the observed large dichroism indicates that the spectra originate from ferromagnetic substitutional Mn. Simulations of the spectra using an Anderson impurity model show that the ferromagnetic Mn 3d electrons of substitutional Mn in (Ga,Mn)As are intermediate between localized and delocalized.
authors.affiliation: School of Physics and Astronomy, University of Nottingham, Nottingham NG7 2RD, United Kingdom.
authors.forename: K W
authors.initials: KW
authors.lastname: Edmonds
authors.forename: G
authors.initials: G
authors.lastname: van der Laan
authors.forename: N R S
authors.initials: NR
authors.lastname: Farley
authors.forename: R P
authors.initials: RP
authors.lastname: Campion
authors.forename: B L
authors.initials: BL
authors.lastname: Gallagher
authors.forename: C T
authors.initials: CT
authors.lastname: Foxon
authors.forename: B C C
authors.initials: BC
authors.lastname: Cowie
authors.forename: S
authors.initials: S
authors.lastname: Warren
authors.forename: T K
authors.initials: TK
authors.lastname: Johal